/src/php-src/Zend/zend_builtin_functions.c

Source
/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright © Zend Technologies Ltd., a subsidiary company of          |
   |     Perforce Software, Inc., and Contributors.                       |
   +----------------------------------------------------------------------+
   | This source file is subject to the Modified BSD License that is      |
   | bundled with this package in the file LICENSE, and is available      |
   | through the World Wide Web at <https://www.php.net/license/>.        |
   |                                                                      |
   | SPDX-License-Identifier: BSD-3-Clause                                |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   +----------------------------------------------------------------------+
*/

#include "php_version.h"
#include "zend.h"
#include "zend_API.h"
#include "zend_attributes.h"
#include "zend_gc.h"
#include "zend_builtin_functions.h"
#include "zend_constants.h"
#include "zend_ini.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "zend_extensions.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_autoload.h"
#include "zend_builtin_functions_arginfo.h"
#include "zend_smart_str.h"

/* }}} */

ZEND_MINIT_FUNCTION(core) { /* {{{ */
  zend_autoload = zend_perform_class_autoload;
  zend_register_default_classes();

  zend_standard_class_def = register_class_stdClass();

  return SUCCESS;
}
/* }}} */

static zend_module_entry zend_builtin_module = { /* {{{ */
  STANDARD_MODULE_HEADER,
  "Core",
  ext_functions,
  ZEND_MINIT(core),
  NULL,
  NULL,
  NULL,
  NULL,
  ZEND_VERSION,
  STANDARD_MODULE_PROPERTIES
};
/* }}} */

zend_result zend_startup_builtin_functions(void) /* {{{ */
{
  zend_module_entry *module;
  EG(current_module) = module = zend_register_module_ex(&zend_builtin_module, MODULE_PERSISTENT);
  if (UNEXPECTED(module == NULL)) {
    return FAILURE;
  }
  ZEND_ASSERT(module->module_number == 0);
  return SUCCESS;
}
/* }}} */

ZEND_FUNCTION(clone)
{
  zend_object *zobj;
  HashTable *with = (HashTable*)&zend_empty_array;

  ZEND_PARSE_PARAMETERS_START(1, 2)
    Z_PARAM_OBJ(zobj)
    Z_PARAM_OPTIONAL
    Z_PARAM_ARRAY_HT(with)
  ZEND_PARSE_PARAMETERS_END();

  /* clone() also exists as the ZEND_CLONE OPcode and both implementations must be kept in sync. */

  const zend_class_entry *scope = zend_get_executed_scope();

  const zend_class_entry *ce = zobj->ce;
  const zend_function *clone = ce->clone;

  if (UNEXPECTED(zobj->handlers->clone_obj == NULL)) {
    zend_throw_error(NULL, "Trying to clone an uncloneable object of class %s", ZSTR_VAL(ce->name));
    RETURN_THROWS();
  }

  if (clone && !zend_check_method_accessible(clone, scope)) {
    zend_bad_method_call(clone, clone->common.function_name, scope);
    RETURN_THROWS();
  }

  zend_object *cloned;
  if (zend_hash_num_elements(with) > 0) {
    if (UNEXPECTED(!zobj->handlers->clone_obj_with)) {
      zend_throw_error(NULL, "Cloning objects of class %s with updated properties is not supported", ZSTR_VAL(ce->name));
      RETURN_THROWS();
    }

    cloned = zobj->handlers->clone_obj_with(zobj, scope, with);
  } else {
    cloned = zobj->handlers->clone_obj(zobj);
  }

  ZEND_ASSERT(cloned || EG(exception));
  if (EXPECTED(cloned)) {
    RETURN_OBJ(cloned);
  }
}

ZEND_FUNCTION(exit)
{
  zend_string *str = NULL;
  zend_long status = 0;

  ZEND_PARSE_PARAMETERS_START(0, 1)
    Z_PARAM_OPTIONAL
    Z_PARAM_STR_OR_LONG(str, status)
  ZEND_PARSE_PARAMETERS_END();

  if (str) {
    size_t len = ZSTR_LEN(str);
    if (len != 0) {
      /* An exception might be emitted by an output handler */
      zend_write(ZSTR_VAL(str), len);
      if (EG(exception)) {
        RETURN_THROWS();
      }
    }
  } else {
    EG(exit_status) = status;
  }

  ZEND_ASSERT(!EG(exception));
  zend_throw_unwind_exit();
}

/* {{{ Get the version of the Zend Engine */
ZEND_FUNCTION(zend_version)
{
  ZEND_PARSE_PARAMETERS_NONE();

  RETURN_STRINGL(ZEND_VERSION, sizeof(ZEND_VERSION)-1);
}
/* }}} */

/* {{{ Reclaims memory used by MM caches.
   Returns number of freed bytes */
ZEND_FUNCTION(gc_mem_caches)
{
  ZEND_PARSE_PARAMETERS_NONE();

  RETURN_LONG(zend_mm_gc(zend_mm_get_heap()));
}
/* }}} */

/* {{{ Forces collection of any existing garbage cycles.
   Returns number of freed zvals */
ZEND_FUNCTION(gc_collect_cycles)
{
  ZEND_PARSE_PARAMETERS_NONE();

  RETURN_LONG(gc_collect_cycles());
}
/* }}} */

/* {{{ Returns status of the circular reference collector */
ZEND_FUNCTION(gc_enabled)
{
  ZEND_PARSE_PARAMETERS_NONE();

  RETURN_BOOL(gc_enabled());
}
/* }}} */

/* {{{ Activates the circular reference collector */
ZEND_FUNCTION(gc_enable)
{
  zend_string *key;

  ZEND_PARSE_PARAMETERS_NONE();

  key = ZSTR_INIT_LITERAL("zend.enable_gc", 0);
  zend_alter_ini_entry_chars(key, "1", sizeof("1")-1, ZEND_INI_USER, ZEND_INI_STAGE_RUNTIME);
  zend_string_release_ex(key, 0);
}
/* }}} */

/* {{{ Deactivates the circular reference collector */
ZEND_FUNCTION(gc_disable)
{
  zend_string *key;

  ZEND_PARSE_PARAMETERS_NONE();

  key = ZSTR_INIT_LITERAL("zend.enable_gc", 0);
  zend_alter_ini_entry_chars(key, "0", sizeof("0")-1, ZEND_INI_USER, ZEND_INI_STAGE_RUNTIME);
  zend_string_release_ex(key, 0);
}
/* }}} */

/* {{{ Returns current GC statistics */
ZEND_FUNCTION(gc_status)
{
  zend_gc_status status;

  ZEND_PARSE_PARAMETERS_NONE();

  zend_gc_get_status(&status);

  array_init_size(return_value, 16);

  add_assoc_bool_ex(return_value, "running", sizeof("running")-1, status.active);
  add_assoc_bool_ex(return_value, "protected", sizeof("protected")-1, status.gc_protected);
  add_assoc_bool_ex(return_value, "full", sizeof("full")-1, status.full);
  add_assoc_long_ex(return_value, "runs", sizeof("runs")-1, (long)status.runs);
  add_assoc_long_ex(return_value, "collected", sizeof("collected")-1, (long)status.collected);
  add_assoc_long_ex(return_value, "threshold", sizeof("threshold")-1, (long)status.threshold);
  add_assoc_long_ex(return_value, "buffer_size", sizeof("buffer_size")-1, (long)status.buf_size);
  add_assoc_long_ex(return_value, "roots", sizeof("roots")-1, (long)status.num_roots);

  /* Using double because zend_long may be too small on some platforms */
  add_assoc_double_ex(return_value, "application_time", sizeof("application_time")-1, (double) status.application_time / ZEND_NANO_IN_SEC);
  add_assoc_double_ex(return_value, "collector_time", sizeof("collector_time")-1, (double) status.collector_time / ZEND_NANO_IN_SEC);
  add_assoc_double_ex(return_value, "destructor_time", sizeof("destructor_time")-1, (double) status.dtor_time / ZEND_NANO_IN_SEC);
  add_assoc_double_ex(return_value, "free_time", sizeof("free_time")-1, (double) status.free_time / ZEND_NANO_IN_SEC);
}
/* }}} */

/* {{{ Get the number of arguments that were passed to the function */
ZEND_FUNCTION(func_num_args)
{
  const zend_execute_data *ex = EX(prev_execute_data);

  ZEND_PARSE_PARAMETERS_NONE();

  if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
    zend_throw_error(NULL, "func_num_args() must be called from a function context");
    RETURN_THROWS();
  }

  if (zend_forbid_dynamic_call() == FAILURE) {
    RETURN_THROWS();
  }

  RETURN_LONG(ZEND_CALL_NUM_ARGS(ex));
}
/* }}} */

/* {{{ Get the $arg_num'th argument that was passed to the function */
ZEND_FUNCTION(func_get_arg)
{
  uint32_t arg_count, first_extra_arg;
  zval *arg;
  zend_long requested_offset;
  zend_execute_data *ex;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &requested_offset) == FAILURE) {
    RETURN_THROWS();
  }

  if (requested_offset < 0) {
    zend_argument_value_error(1, "must be greater than or equal to 0");
    RETURN_THROWS();
  }

  ex = EX(prev_execute_data);
  if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
    zend_throw_error(NULL, "func_get_arg() cannot be called from the global scope");
    RETURN_THROWS();
  }

  if (zend_forbid_dynamic_call() == FAILURE) {
    RETURN_THROWS();
  }

  arg_count = ZEND_CALL_NUM_ARGS(ex);

  if ((zend_ulong)requested_offset >= arg_count) {
    zend_argument_value_error(1, "must be less than the number of the arguments passed to the currently executed function");
    RETURN_THROWS();
  }

  first_extra_arg = ex->func->op_array.num_args;
  if ((zend_ulong)requested_offset >= first_extra_arg && (ZEND_CALL_NUM_ARGS(ex) > first_extra_arg)) {
    arg = ZEND_CALL_VAR_NUM(ex, ex->func->op_array.last_var + ex->func->op_array.T) + (requested_offset - first_extra_arg);
  } else {
    arg = ZEND_CALL_ARG(ex, requested_offset + 1);
  }
  if (EXPECTED(!Z_ISUNDEF_P(arg))) {
    RETURN_COPY_DEREF(arg);
  }
}
/* }}} */

/* {{{ Get an array of the arguments that were passed to the function */
ZEND_FUNCTION(func_get_args)
{
  zval *p, *q;
  uint32_t arg_count, first_extra_arg;
  uint32_t i;
  zend_execute_data *ex = EX(prev_execute_data);

  ZEND_PARSE_PARAMETERS_NONE();

  if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_CODE)) {
    zend_throw_error(NULL, "func_get_args() cannot be called from the global scope");
    RETURN_THROWS();
  }

  if (zend_forbid_dynamic_call() == FAILURE) {
    RETURN_THROWS();
  }

  arg_count = ZEND_CALL_NUM_ARGS(ex);

  if (arg_count) {
    array_init_size(return_value, arg_count);
    first_extra_arg = ex->func->op_array.num_args;
    zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
    ZEND_HASH_FILL_PACKED(Z_ARRVAL_P(return_value)) {
      i = 0;
      p = ZEND_CALL_ARG(ex, 1);
      if (arg_count > first_extra_arg) {
        while (i < first_extra_arg) {
          q = p;
          if (EXPECTED(Z_TYPE_INFO_P(q) != IS_UNDEF)) {
            ZVAL_DEREF(q);
            if (Z_OPT_REFCOUNTED_P(q)) {
              Z_ADDREF_P(q);
            }
            ZEND_HASH_FILL_SET(q);
          } else {
            ZEND_HASH_FILL_SET_NULL();
          }
          ZEND_HASH_FILL_NEXT();
          p++;
          i++;
        }
        p = ZEND_CALL_VAR_NUM(ex, ex->func->op_array.last_var + ex->func->op_array.T);
      }
      while (i < arg_count) {
        q = p;
        if (EXPECTED(Z_TYPE_INFO_P(q) != IS_UNDEF)) {
          ZVAL_DEREF(q);
          if (Z_OPT_REFCOUNTED_P(q)) {
            Z_ADDREF_P(q);
          }
          ZEND_HASH_FILL_SET(q);
        } else {
          ZEND_HASH_FILL_SET_NULL();
        }
        ZEND_HASH_FILL_NEXT();
        p++;
        i++;
      }
    } ZEND_HASH_FILL_END();
    Z_ARRVAL_P(return_value)->nNumOfElements = arg_count;
  } else {
    RETURN_EMPTY_ARRAY();
  }
}
/* }}} */

/* {{{ Get string length
   Warning: This function is special-cased by zend_compile.c and so is usually bypassed */
ZEND_FUNCTION(strlen)
{
  zend_string *s;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_STR(s)
  ZEND_PARSE_PARAMETERS_END();

  RETVAL_LONG(ZSTR_LEN(s));
}
/* }}} */

/* {{{ Binary safe string comparison */
ZEND_FUNCTION(strcmp)
{
  zend_string *s1, *s2;

  ZEND_PARSE_PARAMETERS_START(2, 2)
    Z_PARAM_STR(s1)
    Z_PARAM_STR(s2)
  ZEND_PARSE_PARAMETERS_END();

  RETURN_LONG(zend_binary_strcmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2)));
}
/* }}} */

/* {{{ Binary safe string comparison */
ZEND_FUNCTION(strncmp)
{
  zend_string *s1, *s2;
  zend_long len;

  ZEND_PARSE_PARAMETERS_START(3, 3)
    Z_PARAM_STR(s1)
    Z_PARAM_STR(s2)
    Z_PARAM_LONG(len)
  ZEND_PARSE_PARAMETERS_END();

  if (len < 0) {
    zend_argument_value_error(3, "must be greater than or equal to 0");
    RETURN_THROWS();
  }

  RETURN_LONG(zend_binary_strncmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2), len));
}
/* }}} */

/* {{{ Binary safe case-insensitive string comparison */
ZEND_FUNCTION(strcasecmp)
{
  zend_string *s1, *s2;

  ZEND_PARSE_PARAMETERS_START(2, 2)
    Z_PARAM_STR(s1)
    Z_PARAM_STR(s2)
  ZEND_PARSE_PARAMETERS_END();

  RETURN_LONG(zend_binary_strcasecmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2)));
}
/* }}} */

/* {{{ Binary safe string comparison */
ZEND_FUNCTION(strncasecmp)
{
  zend_string *s1, *s2;
  zend_long len;

  ZEND_PARSE_PARAMETERS_START(3, 3)
    Z_PARAM_STR(s1)
    Z_PARAM_STR(s2)
    Z_PARAM_LONG(len)
  ZEND_PARSE_PARAMETERS_END();

  if (len < 0) {
    zend_argument_value_error(3, "must be greater than or equal to 0");
    RETURN_THROWS();
  }

  RETURN_LONG(zend_binary_strncasecmp(ZSTR_VAL(s1), ZSTR_LEN(s1), ZSTR_VAL(s2), ZSTR_LEN(s2), len));
}
/* }}} */

/* {{{ Return the current error_reporting level, and if an argument was passed - change to the new level */
ZEND_FUNCTION(error_reporting)
{
  zend_long err;
  bool err_is_null = 1;
  int old_error_reporting;

  ZEND_PARSE_PARAMETERS_START(0, 1)
    Z_PARAM_OPTIONAL
    Z_PARAM_LONG_OR_NULL(err, err_is_null)
  ZEND_PARSE_PARAMETERS_END();

  old_error_reporting = EG(error_reporting);

  if (!err_is_null && err != old_error_reporting) {
    zend_ini_entry *p = EG(error_reporting_ini_entry);

    if (!p) {
      zval *zv = zend_hash_find_known_hash(EG(ini_directives), ZSTR_KNOWN(ZEND_STR_ERROR_REPORTING));
      if (!zv) {
        /* Ini setting does not exist -- can this happen? */
        RETURN_LONG(old_error_reporting);
      }

      p = EG(error_reporting_ini_entry) = (zend_ini_entry*)Z_PTR_P(zv);
    }
    if (!p->modified) {
      if (!EG(modified_ini_directives)) {
        ALLOC_HASHTABLE(EG(modified_ini_directives));
        zend_hash_init(EG(modified_ini_directives), 8, NULL, NULL, 0);
      }
      if (EXPECTED(zend_hash_add_ptr(EG(modified_ini_directives), ZSTR_KNOWN(ZEND_STR_ERROR_REPORTING), p) != NULL)) {
        p->orig_value = p->value;
        p->orig_modifiable = p->modifiable;
        p->modified = 1;
      }
    } else if (p->orig_value != p->value) {
      zend_string_release_ex(p->value, 0);
    }

    p->value = zend_long_to_str(err);
    EG(error_reporting) = err;
  }

  RETURN_LONG(old_error_reporting);
}
/* }}} */

static bool validate_constant_array_argument(HashTable *ht, uint32_t argument_number) /* {{{ */
{
  bool ret = true;
  zval *val;

  GC_PROTECT_RECURSION(ht);
  ZEND_HASH_FOREACH_VAL(ht, val) {
    ZVAL_DEREF(val);
    if (Z_TYPE_P(val) == IS_ARRAY && Z_REFCOUNTED_P(val)) {
      if (Z_IS_RECURSIVE_P(val)) {
        zend_argument_value_error(argument_number, "cannot be a recursive array");
        ret = false;
        break;
      } else if (!validate_constant_array_argument(Z_ARRVAL_P(val), argument_number)) {
        ret = false;
        break;
      }
    }
  } ZEND_HASH_FOREACH_END();
  GC_UNPROTECT_RECURSION(ht);
  return ret;
}
/* }}} */

static void copy_constant_array(zval *dst, const zval *src) /* {{{ */
{
  zend_string *key;
  zend_ulong idx;
  zval *new_val, *val;

  array_init_size(dst, zend_hash_num_elements(Z_ARRVAL_P(src)));
  ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(src), idx, key, val) {
    /* constant arrays can't contain references */
    ZVAL_DEREF(val);
    if (key) {
      new_val = zend_hash_add_new(Z_ARRVAL_P(dst), key, val);
    } else {
      new_val = zend_hash_index_add_new(Z_ARRVAL_P(dst), idx, val);
    }
    if (Z_TYPE_P(val) == IS_ARRAY) {
      if (Z_REFCOUNTED_P(val)) {
        copy_constant_array(new_val, val);
      }
    } else {
      Z_TRY_ADDREF_P(val);
    }
  } ZEND_HASH_FOREACH_END();
}
/* }}} */

/* {{{ Define a new constant */
ZEND_FUNCTION(define)
{
  zend_string *name;
  zval *val;
  bool non_cs = 0;
  zend_constant c;

  ZEND_PARSE_PARAMETERS_START(2, 3)
    Z_PARAM_STR(name)
    Z_PARAM_ZVAL(val)
    Z_PARAM_OPTIONAL
    Z_PARAM_BOOL(non_cs)
  ZEND_PARSE_PARAMETERS_END();

  if (ZEND_NUM_ARGS() == 3) {
    zend_error(E_DEPRECATED,
      "define(): Argument #3 ($case_insensitive) is ignored and treated as false since declaration of case-insensitive constants is no longer supported, passing the argument explicitly is unnecessary"
    );
    if (UNEXPECTED(EG(exception))) {
      RETURN_THROWS();
    }
  }

  if (zend_memnstr(ZSTR_VAL(name), "::", sizeof("::") - 1, ZSTR_VAL(name) + ZSTR_LEN(name))) {
    zend_argument_value_error(1, "cannot be a class constant");
    RETURN_THROWS();
  }

  if (non_cs) {
    zend_error(E_WARNING, "define(): Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported, this will be an error in PHP 9.0");
    if (UNEXPECTED(EG(exception))) {
      RETURN_THROWS();
    }
  }

  if (Z_TYPE_P(val) == IS_ARRAY && Z_REFCOUNTED_P(val)) {
    if (!validate_constant_array_argument(Z_ARRVAL_P(val), 2)) {
      RETURN_THROWS();
    } else {
      copy_constant_array(&c.value, val);
    }
  } else {
    ZVAL_COPY(&c.value, val);
  }

  /* non persistent */
  ZEND_CONSTANT_SET_FLAGS(&c, 0, PHP_USER_CONSTANT);
  c.name = zend_string_copy(name);
  RETURN_BOOL(zend_register_constant(&c) != NULL);
}
/* }}} */

/* {{{ Check whether a constant exists
   Warning: This function is special-cased by zend_compile.c and so is usually bypassed */
ZEND_FUNCTION(defined)
{
  zend_string *name;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_STR(name)
  ZEND_PARSE_PARAMETERS_END();

  RETURN_BOOL(zend_get_constant_ex(name, zend_get_executed_scope(), ZEND_FETCH_CLASS_SILENT));
}
/* }}} */

/* {{{ Retrieves the class name */
ZEND_FUNCTION(get_class)
{
  zval *obj = NULL;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|o", &obj) == FAILURE) {
    RETURN_THROWS();
  }

  if (!obj) {
    const zend_class_entry *scope = zend_get_executed_scope();

    if (scope) {
      zend_error(E_DEPRECATED, "Calling get_class() without arguments is deprecated");
      if (UNEXPECTED(EG(exception))) {
        RETURN_THROWS();
      }
      RETURN_STR_COPY(scope->name);
    } else {
      zend_throw_error(NULL, "get_class() without arguments must be called from within a class");
      RETURN_THROWS();
    }
  }

  RETURN_STR_COPY(Z_OBJCE_P(obj)->name);
}
/* }}} */

/* {{{ Retrieves the "Late Static Binding" class name */
ZEND_FUNCTION(get_called_class)
{
  ZEND_PARSE_PARAMETERS_NONE();

  const zend_class_entry *called_scope = zend_get_called_scope(execute_data);
  if (!called_scope) {
    zend_throw_error(NULL, "get_called_class() must be called from within a class");
    RETURN_THROWS();
  }

  RETURN_STR_COPY(called_scope->name);
}
/* }}} */

/* {{{ Retrieves the parent class name for object or class or current scope or false if not in a scope. */
ZEND_FUNCTION(get_parent_class)
{
  zend_class_entry *ce = NULL;

  ZEND_PARSE_PARAMETERS_START(0, 1)
    Z_PARAM_OPTIONAL
    Z_PARAM_OBJ_OR_CLASS_NAME(ce)
  ZEND_PARSE_PARAMETERS_END();

  if (!ce) {
    zend_error(E_DEPRECATED, "Calling get_parent_class() without arguments is deprecated");
    if (UNEXPECTED(EG(exception))) {
      RETURN_THROWS();
    }
    ce = zend_get_executed_scope();
  }

  if (ce && ce->parent) {
    RETURN_STR_COPY(ce->parent->name);
  } else {
    RETURN_FALSE;
  }
}
/* }}} */

static void is_a_impl(INTERNAL_FUNCTION_PARAMETERS, bool only_subclass) /* {{{ */
{
  zval *obj;
  zend_string *class_name;
  const zend_class_entry *instance_ce;
  bool allow_string = only_subclass;

  ZEND_PARSE_PARAMETERS_START(2, 3)
    Z_PARAM_ZVAL(obj)
    Z_PARAM_STR(class_name)
    Z_PARAM_OPTIONAL
    Z_PARAM_BOOL(allow_string)
  ZEND_PARSE_PARAMETERS_END();
  /*
   * allow_string - is_a default is no, is_subclass_of is yes.
   *   if it's allowed, then the autoloader will be called if the class does not exist.
   *   default behaviour is different, as 'is_a' used to be used to test mixed return values
   *   and there is no easy way to deprecate this.
   */

  if (allow_string && Z_TYPE_P(obj) == IS_STRING) {
    instance_ce = zend_lookup_class(Z_STR_P(obj));
    if (!instance_ce) {
      RETURN_FALSE;
    }
  } else if (Z_TYPE_P(obj) == IS_STRING) {
    // is_a() uses only_subclass as false, is_subclass_of() uses it as true
    zend_error(
      E_DEPRECATED,
      only_subclass
        ? "Calling is_subclass_of() with a string when $allow_string is false"
        : "Calling is_a() with a string when $allow_string is false"
    );
    if (UNEXPECTED(EG(exception))) {
      RETURN_THROWS();
    }
    RETURN_FALSE;
  } else if (Z_TYPE_P(obj) == IS_OBJECT) {
    instance_ce = Z_OBJCE_P(obj);
  } else {
    RETURN_FALSE;
  }

  if (!only_subclass && EXPECTED(zend_string_equals(instance_ce->name, class_name))) {
    RETURN_TRUE;
  }

  const zend_class_entry *ce = zend_lookup_class_ex(class_name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
  if (!ce) {
    RETURN_FALSE;
  }

  if (only_subclass && instance_ce == ce) {
    RETURN_FALSE;
  }

  RETURN_BOOL(instanceof_function(instance_ce, ce));
}
/* }}} */

/* {{{ Returns true if the object has this class as one of its parents */
ZEND_FUNCTION(is_subclass_of)
{
  is_a_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1);
}
/* }}} */

/* {{{ Returns true if the first argument is an object and is this class or has this class as one of its parents, */
ZEND_FUNCTION(is_a)
{
  is_a_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0);
}
/* }}} */

/* {{{ add_class_vars */
static void add_class_vars(const zend_class_entry *scope, zend_class_entry *ce, bool statics, const zval *return_value)
{
  zend_property_info *prop_info;
  zval *prop, prop_copy;
  zend_string *key;
  zval *default_properties_table = CE_DEFAULT_PROPERTIES_TABLE(ce);

  ZEND_HASH_MAP_FOREACH_STR_KEY_PTR(&ce->properties_info, key, prop_info) {
    if (((prop_info->flags & ZEND_ACC_PROTECTED) &&
       !zend_check_protected(prop_info->ce, scope)) ||
      ((prop_info->flags & ZEND_ACC_PRIVATE) &&
        prop_info->ce != scope) ||
      (prop_info->flags & ZEND_ACC_VIRTUAL)) {
      continue;
    }
    prop = NULL;
    if (statics && (prop_info->flags & ZEND_ACC_STATIC) != 0) {
      prop = &ce->default_static_members_table[prop_info->offset];
      ZVAL_DEINDIRECT(prop);
    } else if (!statics && (prop_info->flags & ZEND_ACC_STATIC) == 0) {
      prop = &default_properties_table[OBJ_PROP_TO_NUM(prop_info->offset)];
    }
    if (!prop) {
      continue;
    }

    if (Z_ISUNDEF_P(prop)) {
      /* Return uninitialized typed properties as a null value */
      ZVAL_NULL(&prop_copy);
    } else {
      /* copy: enforce read only access */
      ZVAL_COPY_OR_DUP(&prop_copy, prop);
    }
    prop = &prop_copy;

    /* this is necessary to make it able to work with default array
     * properties, returned to user */
    if (Z_OPT_TYPE_P(prop) == IS_CONSTANT_AST) {
      if (UNEXPECTED(zval_update_constant_ex(prop, ce) != SUCCESS)) {
        return;
      }
    }

    zend_hash_add_new(Z_ARRVAL_P(return_value), key, prop);
  } ZEND_HASH_FOREACH_END();
}
/* }}} */

/* {{{ Returns an array of default properties of the class. */
ZEND_FUNCTION(get_class_vars)
{
  zend_class_entry *ce = NULL;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "C", &ce) == FAILURE) {
    RETURN_THROWS();
  }

  array_init(return_value);
  if (UNEXPECTED(!(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED))) {
    if (UNEXPECTED(zend_update_class_constants(ce) != SUCCESS)) {
      return;
    }
  }

  const zend_class_entry *scope = zend_get_executed_scope();
  add_class_vars(scope, ce, false, return_value);
  add_class_vars(scope, ce, true, return_value);
}
/* }}} */

/* {{{ Returns an array of object properties */
ZEND_FUNCTION(get_object_vars)
{
  zval *value;
  HashTable *properties;
  zend_string *key;
  zend_object *zobj;
  zend_ulong num_key;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_OBJ(zobj)
  ZEND_PARSE_PARAMETERS_END();

  zval obj_zv;
  ZVAL_OBJ(&obj_zv, zobj);
  properties = zend_get_properties_for(&obj_zv, ZEND_PROP_PURPOSE_GET_OBJECT_VARS);
  if (properties == NULL) {
    RETURN_EMPTY_ARRAY();
  }

  if (!zobj->ce->default_properties_count && properties == zobj->properties && !GC_IS_RECURSIVE(properties)) {
    /* fast copy */
    bool always_duplicate = zobj->handlers != &std_object_handlers;
    RETVAL_ARR(zend_proptable_to_symtable(properties, always_duplicate));
  } else {
    array_init_size(return_value, zend_hash_num_elements(properties));

    ZEND_HASH_FOREACH_KEY_VAL(properties, num_key, key, value) {
      bool is_dynamic = 1;
      zval tmp;
      ZVAL_UNDEF(&tmp);
      if (Z_TYPE_P(value) == IS_INDIRECT) {
        value = Z_INDIRECT_P(value);
        if (UNEXPECTED(Z_ISUNDEF_P(value))) {
          continue;
        }

        is_dynamic = 0;
      } else if (Z_TYPE_P(value) == IS_PTR) {
        is_dynamic = 0;
      }

      if (key && zend_check_property_access(zobj, key, is_dynamic) == FAILURE) {
        continue;
      }

      if (Z_ISREF_P(value) && Z_REFCOUNT_P(value) == 1) {
        value = Z_REFVAL_P(value);
      }
      if (Z_TYPE_P(value) == IS_PTR) {
        /* value is IS_PTR for properties with hooks. */
        zend_property_info *prop_info = Z_PTR_P(value);
        if ((prop_info->flags & ZEND_ACC_VIRTUAL) && !prop_info->hooks[ZEND_PROPERTY_HOOK_GET]) {
          continue;
        }
        const char *unmangled_name_cstr = zend_get_unmangled_property_name(prop_info->name);
        zend_string *unmangled_name = zend_string_init(unmangled_name_cstr, strlen(unmangled_name_cstr), false);
        value = zend_read_property_ex(prop_info->ce, zobj, unmangled_name, /* silent */ true, &tmp);
        zend_string_release_ex(unmangled_name, false);
        if (EG(exception)) {
          zend_release_properties(properties);
          zval_ptr_dtor(return_value);
          ZVAL_UNDEF(return_value);
          RETURN_THROWS();
        }
      }
      Z_TRY_ADDREF_P(value);

      if (UNEXPECTED(!key)) {
        /* This case is only possible due to loopholes, e.g. ArrayObject */
        zend_hash_index_add(Z_ARRVAL_P(return_value), num_key, value);
      } else if (!is_dynamic && ZSTR_VAL(key)[0] == 0) {
        const char *prop_name, *class_name;
        size_t prop_len;
        zend_unmangle_property_name_ex(key, &class_name, &prop_name, &prop_len);
        /* We assume here that a mangled property name is never
         * numeric. This is probably a safe assumption, but
         * theoretically someone might write an extension with
         * private, numeric properties. Well, too bad.
         */
        zend_hash_str_add_new(Z_ARRVAL_P(return_value), prop_name, prop_len, value);
      } else {
        zend_symtable_add_new(Z_ARRVAL_P(return_value), key, value);
      }
      zval_ptr_dtor(&tmp);
    } ZEND_HASH_FOREACH_END();
  }
  zend_release_properties(properties);
}
/* }}} */

/* {{{ Returns an array of mangled object properties. Does not respect property visibility. */
ZEND_FUNCTION(get_mangled_object_vars)
{
  zend_object *obj;
  HashTable *properties;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_OBJ(obj)
  ZEND_PARSE_PARAMETERS_END();

  properties = zend_get_properties_no_lazy_init(obj);
  if (!properties) {
    ZVAL_EMPTY_ARRAY(return_value);
    return;
  }

  properties = zend_proptable_to_symtable(properties,
    (obj->ce->default_properties_count ||
     obj->handlers != &std_object_handlers ||
     GC_IS_RECURSIVE(properties)));
  RETURN_ARR(properties);
}
/* }}} */

/* {{{ Returns an array of method names for class or class instance. */
ZEND_FUNCTION(get_class_methods)
{
  zval method_name;
  zend_class_entry *ce = NULL;
  zend_function *mptr;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_OBJ_OR_CLASS_NAME(ce)
  ZEND_PARSE_PARAMETERS_END();

  array_init(return_value);
  const zend_class_entry *scope = zend_get_executed_scope();

  ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, mptr) {
    if (zend_check_method_accessible(mptr, scope)) {
      ZVAL_STR_COPY(&method_name, mptr->common.function_name);
      zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), &method_name);
    }
  } ZEND_HASH_FOREACH_END();

  if (ce == zend_ce_closure) {
    ZVAL_STR_COPY(&method_name, ZSTR_KNOWN(ZEND_STR_MAGIC_INVOKE));
    zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), &method_name);
  }
}
/* }}} */

/* {{{ Checks if the class method exists */
ZEND_FUNCTION(method_exists)
{
  zval *klass;
  zend_string *method_name;
  zend_class_entry *ce;
  zend_function *func;

  /* We do not use Z_PARAM_OBJ_OR_STR here to be able to exclude int, float, and bool which are bogus class names */
  ZEND_PARSE_PARAMETERS_START(2, 2)
    Z_PARAM_ZVAL(klass)
    Z_PARAM_STR(method_name)
  ZEND_PARSE_PARAMETERS_END();

  if (Z_TYPE_P(klass) == IS_OBJECT) {
    ce = Z_OBJCE_P(klass);
  } else if (Z_TYPE_P(klass) == IS_STRING) {
    if ((ce = zend_lookup_class(Z_STR_P(klass))) == NULL) {
      RETURN_FALSE;
    }
  } else {
    zend_wrong_parameter_type_error(1, Z_EXPECTED_OBJECT_OR_STRING, klass);
    RETURN_THROWS();
  }

  func = zend_hash_find_ptr_lc(&ce->function_table, method_name);

  if (func) {
    /* Exclude shadow properties when checking a method on a specific class. Include
     * them when checking an object, as method_exists() generally ignores visibility.
     * TODO: Should we use EG(scope) for the object case instead? */
    RETURN_BOOL(Z_TYPE_P(klass) == IS_OBJECT
      || !(func->common.fn_flags & ZEND_ACC_PRIVATE) || func->common.scope == ce);
  }

  if (Z_TYPE_P(klass) == IS_OBJECT) {
    zend_object *obj = Z_OBJ_P(klass);
    func = Z_OBJ_HT_P(klass)->get_method(&obj, method_name, NULL);
    if (func != NULL) {
      if (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
        /* Returns true for the fake Closure's __invoke */
        RETVAL_BOOL(func->common.scope == zend_ce_closure
          && zend_string_equals_literal_ci(method_name, ZEND_INVOKE_FUNC_NAME));

        zend_string_release_ex(func->common.function_name, 0);
        zend_free_trampoline(func);
        return;
      }
      RETURN_TRUE;
    }
  } else {
      /* Returns true for fake Closure::__invoke */
      if (ce == zend_ce_closure
          && zend_string_equals_literal_ci(method_name, ZEND_INVOKE_FUNC_NAME)) {
          RETURN_TRUE;
      }
  }
  RETURN_FALSE;
}
/* }}} */

static void _property_exists(zval *return_value, const zval *object, zend_string *property)
{
  zend_class_entry *ce;

  if (Z_TYPE_P(object) == IS_STRING) {
    ce = zend_lookup_class(Z_STR_P(object));
    if (!ce) {
      RETURN_FALSE;
    }
  } else if (Z_TYPE_P(object) == IS_OBJECT) {
    ce = Z_OBJCE_P(object);
  } else {
    zend_wrong_parameter_type_error(1, Z_EXPECTED_OBJECT_OR_STRING, object);
    RETURN_THROWS();
  }

  const zend_property_info *property_info = zend_hash_find_ptr(&ce->properties_info, property);
  if (property_info != NULL
   && (!(property_info->flags & ZEND_ACC_PRIVATE)
    || property_info->ce == ce)) {
    RETURN_TRUE;
  }

  RETURN_BOOL(
    Z_TYPE_P(object) == IS_OBJECT &&
    Z_OBJ_HANDLER_P(object, has_property)(Z_OBJ_P(object), property, ZEND_PROPERTY_EXISTS, NULL)
  );
}

/* {{{ Checks if the object or class has a property */
ZEND_FUNCTION(property_exists)
{
  zval *object;
  zend_string *property;

  /* We do not use Z_PARAM_OBJ_OR_STR here to be able to exclude int, float, and bool which are bogus class names */
  if (zend_parse_parameters(ZEND_NUM_ARGS(), "zS", &object, &property) == FAILURE) {
    RETURN_THROWS();
  }

  _property_exists(return_value, object, property);
}
/* }}} */

ZEND_FRAMELESS_FUNCTION(property_exists, 2)
{
  zval *object;
  zval property_tmp;
  zend_string *property;

  Z_FLF_PARAM_ZVAL(1, object);
  Z_FLF_PARAM_STR(2, property, property_tmp);

  _property_exists(return_value, object, property);

flf_clean:;
  Z_FLF_PARAM_FREE_STR(2, property_tmp)
}

static zend_always_inline void _class_exists_impl(zval *return_value, zend_string *name, bool autoload, int flags, int skip_flags) /* {{{ */
{
  const zend_class_entry *ce;

  if (ZSTR_HAS_CE_CACHE(name)) {
    ce = ZSTR_GET_CE_CACHE(name);
    if (ce) {
      RETURN_BOOL(((ce->ce_flags & flags) == flags) && !(ce->ce_flags & skip_flags));
    }
  }

  if (!autoload) {
    if (ZSTR_VAL(name)[0] == '\\') {
      /* Ignore leading "\" */
      ce = zend_hash_str_find_ptr_lc(EG(class_table), ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1);
    } else {
      ce = zend_hash_find_ptr_lc(EG(class_table), name);
    }
  } else {
    ce = zend_lookup_class(name);
  }

  RETURN_BOOL(ce && ((ce->ce_flags & flags) == flags) && !(ce->ce_flags & skip_flags));
}
/* {{{ */

static inline void class_exists_impl(INTERNAL_FUNCTION_PARAMETERS, int flags, int skip_flags) /* {{{ */
{
  zend_string *name;
  bool autoload = true;

  ZEND_PARSE_PARAMETERS_START(1, 2)
    Z_PARAM_STR(name)
    Z_PARAM_OPTIONAL
    Z_PARAM_BOOL(autoload)
  ZEND_PARSE_PARAMETERS_END();

  _class_exists_impl(return_value, name, autoload, flags, skip_flags);
}

/* {{{ Checks if the class exists */
ZEND_FUNCTION(class_exists)
{
  class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED, ZEND_ACC_INTERFACE | ZEND_ACC_TRAIT);
}
/* }}} */

ZEND_FRAMELESS_FUNCTION(class_exists, 1)
{
  zval name_tmp;
  zend_string *name;

  Z_FLF_PARAM_STR(1, name, name_tmp);

  _class_exists_impl(return_value, name, /* autoload */ true, ZEND_ACC_LINKED, ZEND_ACC_INTERFACE | ZEND_ACC_TRAIT);

flf_clean:
  Z_FLF_PARAM_FREE_STR(1, name_tmp);
}

ZEND_FRAMELESS_FUNCTION(class_exists, 2)
{
  zval name_tmp;
  zend_string *name;
  bool autoload;

  Z_FLF_PARAM_STR(1, name, name_tmp);
  Z_FLF_PARAM_BOOL(2, autoload);

  _class_exists_impl(return_value, name, autoload, ZEND_ACC_LINKED, ZEND_ACC_INTERFACE | ZEND_ACC_TRAIT);

flf_clean:
  Z_FLF_PARAM_FREE_STR(1, name_tmp);
}

/* {{{ Checks if the class exists */
ZEND_FUNCTION(interface_exists)
{
  class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED|ZEND_ACC_INTERFACE, 0);
}
/* }}} */

/* {{{ Checks if the trait exists */
ZEND_FUNCTION(trait_exists)
{
  class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_TRAIT, 0);
}
/* }}} */

ZEND_FUNCTION(enum_exists)
{
  class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_ENUM, 0);
}

/* {{{ Checks if the function exists */
ZEND_FUNCTION(function_exists)
{
  zend_string *name;
  bool exists;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_STR(name)
  ZEND_PARSE_PARAMETERS_END();

  if (ZSTR_VAL(name)[0] == '\\') {
    /* Ignore leading "\" */
    exists = zend_hash_str_find_ptr_lc(EG(function_table), ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1) != NULL;
  } else {
    exists = zend_hash_find_ptr_lc(EG(function_table), name) != NULL;
  }

  RETURN_BOOL(exists);
}
/* }}} */

/* {{{ Creates an alias for user defined class */
ZEND_FUNCTION(class_alias)
{
  zend_string *class_name;
  zend_string *alias_name;
  zend_class_entry *ce;
  bool autoload = 1;

  ZEND_PARSE_PARAMETERS_START(2, 3)
    Z_PARAM_STR(class_name)
    Z_PARAM_STR(alias_name)
    Z_PARAM_OPTIONAL
    Z_PARAM_BOOL(autoload)
  ZEND_PARSE_PARAMETERS_END();

  ce = zend_lookup_class_ex(class_name, NULL, !autoload ? ZEND_FETCH_CLASS_NO_AUTOLOAD : 0);

  if (ce) {
    if (zend_register_class_alias_ex(ZSTR_VAL(alias_name), ZSTR_LEN(alias_name), ce, false) == SUCCESS) {
      RETURN_TRUE;
    } else {
      zend_class_redeclaration_error_ex(E_WARNING, alias_name, ce);
      RETURN_FALSE;
    }
  } else {
    zend_error(E_WARNING, "Class \"%s\" not found", ZSTR_VAL(class_name));
    RETURN_FALSE;
  }
}
/* }}} */

/* {{{ Returns an array with the file names that were include_once()'d */
ZEND_FUNCTION(get_included_files)
{
  zend_string *entry;

  ZEND_PARSE_PARAMETERS_NONE();

  array_init(return_value);
  ZEND_HASH_MAP_FOREACH_STR_KEY(&EG(included_files), entry) {
    if (entry) {
      add_next_index_str(return_value, zend_string_copy(entry));
    }
  } ZEND_HASH_FOREACH_END();
}
/* }}} */

/* {{{ Generates a user-level error/warning/notice message */
ZEND_FUNCTION(trigger_error)
{
  zend_long error_type = E_USER_NOTICE;
  zend_string *message;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "S|l", &message, &error_type) == FAILURE) {
    RETURN_THROWS();
  }

  switch (error_type) {
    case E_USER_ERROR:
      zend_error(E_DEPRECATED, "Passing E_USER_ERROR to trigger_error() is deprecated since 8.4,"
        " throw an exception or call exit with a string message instead");
      if (UNEXPECTED(EG(exception))) {
        RETURN_THROWS();
      }
    case E_USER_WARNING:
    case E_USER_NOTICE:
    case E_USER_DEPRECATED:
      break;
    default:
      zend_argument_value_error(2, "must be one of E_USER_ERROR, E_USER_WARNING, E_USER_NOTICE,"
        " or E_USER_DEPRECATED");
      RETURN_THROWS();
      break;
  }

  zend_error_zstr_at(error_type, zend_get_executed_filename_ex(), zend_get_executed_lineno(), message);
  // TODO Change to void
  RETURN_TRUE;
}
/* }}} */

/* {{{ Sets a user-defined error handler function.  Returns the previously defined error handler, or false on error */
ZEND_FUNCTION(set_error_handler)
{
  zend_fcall_info fci;
  zend_fcall_info_cache fcc;
  zend_long error_type = E_ALL;

  ZEND_PARSE_PARAMETERS_START(1, 2)
    Z_PARAM_FUNC_OR_NULL(fci, fcc)
    Z_PARAM_OPTIONAL
    Z_PARAM_LONG(error_type)
  ZEND_PARSE_PARAMETERS_END();

  if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
    ZVAL_COPY(return_value, &EG(user_error_handler));
  }

  zend_stack_push(&EG(user_error_handlers_error_reporting), &EG(user_error_handler_error_reporting));
  zend_stack_push(&EG(user_error_handlers), &EG(user_error_handler));

  if (!ZEND_FCI_INITIALIZED(fci)) { /* unset user-defined handler */
    ZVAL_UNDEF(&EG(user_error_handler));
    return;
  }

  ZVAL_COPY(&EG(user_error_handler), &(fci.function_name));
  EG(user_error_handler_error_reporting) = (int)error_type;
}
/* }}} */

/* {{{ Restores the previously defined error handler function */
ZEND_FUNCTION(restore_error_handler)
{
  ZEND_PARSE_PARAMETERS_NONE();

  if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
    zval zeh;

    ZVAL_COPY_VALUE(&zeh, &EG(user_error_handler));
    ZVAL_UNDEF(&EG(user_error_handler));
    zval_ptr_dtor(&zeh);
  }

  if (zend_stack_is_empty(&EG(user_error_handlers))) {
    ZVAL_UNDEF(&EG(user_error_handler));
  } else {
    zval *tmp;
    EG(user_error_handler_error_reporting) = zend_stack_int_top(&EG(user_error_handlers_error_reporting));
    zend_stack_del_top(&EG(user_error_handlers_error_reporting));
    tmp = zend_stack_top(&EG(user_error_handlers));
    ZVAL_COPY_VALUE(&EG(user_error_handler), tmp);
    zend_stack_del_top(&EG(user_error_handlers));
  }

  // TODO Change to void
  RETURN_TRUE;
}
/* }}} */

ZEND_FUNCTION(get_error_handler)
{
  ZEND_PARSE_PARAMETERS_NONE();

  if (Z_TYPE(EG(user_error_handler)) != IS_UNDEF) {
    RETURN_COPY(&EG(user_error_handler));
  }
}

/* {{{ Sets a user-defined exception handler function. Returns the previously defined exception handler, or false on error */
ZEND_FUNCTION(set_exception_handler)
{
  zend_fcall_info fci;
  zend_fcall_info_cache fcc;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_FUNC_OR_NULL(fci, fcc)
  ZEND_PARSE_PARAMETERS_END();

  if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
    ZVAL_COPY(return_value, &EG(user_exception_handler));
  }

  zend_stack_push(&EG(user_exception_handlers), &EG(user_exception_handler));

  if (!ZEND_FCI_INITIALIZED(fci)) { /* unset user-defined handler */
    ZVAL_UNDEF(&EG(user_exception_handler));
    return;
  }

  ZVAL_COPY(&EG(user_exception_handler), &(fci.function_name));
}
/* }}} */

/* {{{ Restores the previously defined exception handler function */
ZEND_FUNCTION(restore_exception_handler)
{
  ZEND_PARSE_PARAMETERS_NONE();

  if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
    zval_ptr_dtor(&EG(user_exception_handler));
  }
  if (zend_stack_is_empty(&EG(user_exception_handlers))) {
    ZVAL_UNDEF(&EG(user_exception_handler));
  } else {
    zval *tmp = zend_stack_top(&EG(user_exception_handlers));
    ZVAL_COPY_VALUE(&EG(user_exception_handler), tmp);
    zend_stack_del_top(&EG(user_exception_handlers));
  }

  // TODO Change to void
  RETURN_TRUE;
}
/* }}} */

ZEND_FUNCTION(get_exception_handler)
{
  ZEND_PARSE_PARAMETERS_NONE();

  if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
    RETURN_COPY(&EG(user_exception_handler));
  }
}

static inline void get_declared_class_impl(INTERNAL_FUNCTION_PARAMETERS, int flags) /* {{{ */
{
  zend_string *key;
  zval *zv;

  ZEND_PARSE_PARAMETERS_NONE();

  array_init(return_value);
  zend_hash_real_init_packed(Z_ARRVAL_P(return_value));
  ZEND_HASH_FILL_PACKED(Z_ARRVAL_P(return_value)) {
    ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(EG(class_table), key, zv) {
      const zend_class_entry *ce = Z_PTR_P(zv);
      if ((ce->ce_flags & (ZEND_ACC_LINKED|ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT)) == flags
       && key
       && ZSTR_VAL(key)[0] != 0) {
        ZEND_HASH_FILL_GROW();
        if (EXPECTED(Z_TYPE_P(zv) == IS_PTR)) {
          ZEND_HASH_FILL_SET_STR_COPY(ce->name);
        } else {
          ZEND_ASSERT(Z_TYPE_P(zv) == IS_ALIAS_PTR);
          ZEND_HASH_FILL_SET_STR_COPY(key);
        }
        ZEND_HASH_FILL_NEXT();
      }
    } ZEND_HASH_FOREACH_END();
  } ZEND_HASH_FILL_END();
}
/* {{{ */

/* {{{ Returns an array of all declared traits. */
ZEND_FUNCTION(get_declared_traits)
{
  get_declared_class_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED | ZEND_ACC_TRAIT);
}
/* }}} */

/* {{{ Returns an array of all declared classes. */
ZEND_FUNCTION(get_declared_classes)
{
  get_declared_class_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED);
}
/* }}} */

/* {{{ Returns an array of all declared interfaces. */
ZEND_FUNCTION(get_declared_interfaces)
{
  get_declared_class_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED | ZEND_ACC_INTERFACE);
}
/* }}} */

/* {{{ Returns an array of all defined functions */
ZEND_FUNCTION(get_defined_functions)
{
  zval internal, user;
  zend_string *key;
  zend_function *func;
  bool exclude_disabled = true;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|b", &exclude_disabled) == FAILURE) {
    RETURN_THROWS();
  }

  if (ZEND_NUM_ARGS() == 1) {
    zend_error(E_DEPRECATED,
      "get_defined_functions(): The $exclude_disabled parameter has no effect since PHP 8.0");
  }

  array_init(&internal);
  array_init(&user);
  array_init(return_value);

  ZEND_HASH_MAP_FOREACH_STR_KEY_PTR(EG(function_table), key, func) {
    if (key && ZSTR_VAL(key)[0] != 0) {
      if (func->type == ZEND_INTERNAL_FUNCTION) {
        add_next_index_str(&internal, zend_string_copy(key));
      } else if (func->type == ZEND_USER_FUNCTION) {
        add_next_index_str(&user, zend_string_copy(key));
      }
    }
  } ZEND_HASH_FOREACH_END();

  zend_hash_str_add_new(Z_ARRVAL_P(return_value), "internal", sizeof("internal")-1, &internal);
  zend_hash_add_new(Z_ARRVAL_P(return_value), ZSTR_KNOWN(ZEND_STR_USER), &user);
}
/* }}} */

/* {{{ Returns an associative array of names and values of all currently defined variable names (variables in the current scope) */
ZEND_FUNCTION(get_defined_vars)
{
  zend_array *symbol_table;

  ZEND_PARSE_PARAMETERS_NONE();

  if (zend_forbid_dynamic_call() == FAILURE) {
    return;
  }

  symbol_table = zend_rebuild_symbol_table();
  if (UNEXPECTED(symbol_table == NULL)) {
    RETURN_EMPTY_ARRAY();
  }

  RETURN_ARR(zend_array_dup(symbol_table));
}
/* }}} */

#if ZEND_DEBUG && defined(ZTS)
ZEND_FUNCTION(zend_thread_id)
{
  ZEND_PARSE_PARAMETERS_NONE();

  RETURN_LONG((zend_long)tsrm_thread_id());
}
#endif

/* {{{ Get the resource type name for a given resource */
ZEND_FUNCTION(get_resource_type)
{
  const char *resource_type;
  zval *z_resource_type;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &z_resource_type) == FAILURE) {
    RETURN_THROWS();
  }

  resource_type = zend_rsrc_list_get_rsrc_type(Z_RES_P(z_resource_type));
  if (resource_type) {
    RETURN_STRING(resource_type);
  } else {
    RETURN_INTERNED_STR(ZSTR_KNOWN(ZEND_STR_UNKNOWN_CAPITALIZED));
  }
}
/* }}} */

/* {{{ Get the resource ID for a given resource */
ZEND_FUNCTION(get_resource_id)
{
  zval *resource;

  ZEND_PARSE_PARAMETERS_START(1, 1)
    Z_PARAM_RESOURCE(resource)
  ZEND_PARSE_PARAMETERS_END();

  RETURN_LONG(Z_RES_HANDLE_P(resource));
}
/* }}} */

/* {{{ Get an array with all active resources */
ZEND_FUNCTION(get_resources)
{
  zend_string *type = NULL;
  zend_string *key;
  zend_ulong index;
  zval *val;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|S!", &type) == FAILURE) {
    RETURN_THROWS();
  }

  if (!type) {
    array_init(return_value);
    ZEND_HASH_FOREACH_KEY_VAL(&EG(regular_list), index, key, val) {
      if (!key) {
        Z_ADDREF_P(val);
        zend_hash_index_add_new(Z_ARRVAL_P(return_value), index, val);
      }
    } ZEND_HASH_FOREACH_END();
  } else if (zend_string_equals_literal(type, "Unknown")) {
    array_init(return_value);
    ZEND_HASH_FOREACH_KEY_VAL(&EG(regular_list), index, key, val) {
      if (!key && Z_RES_TYPE_P(val) <= 0) {
        Z_ADDREF_P(val);
        zend_hash_index_add_new(Z_ARRVAL_P(return_value), index, val);
      }
    } ZEND_HASH_FOREACH_END();
  } else {
    int id = zend_fetch_list_dtor_id(ZSTR_VAL(type));

    if (id <= 0) {
      zend_argument_value_error(1, "must be a valid resource type");
      RETURN_THROWS();
    }

    array_init(return_value);
    ZEND_HASH_FOREACH_KEY_VAL(&EG(regular_list), index, key, val) {
      if (!key && Z_RES_TYPE_P(val) == id) {
        Z_ADDREF_P(val);
        zend_hash_index_add_new(Z_ARRVAL_P(return_value), index, val);
      }
    } ZEND_HASH_FOREACH_END();
  }
}
/* }}} */

static void add_zendext_info(const zend_extension *ext, void *arg) /* {{{ */
{
  zval *name_array = (zval *)arg;
  add_next_index_string(name_array, ext->name);
}
/* }}} */

/* {{{ Return an array containing names of loaded extensions */
ZEND_FUNCTION(get_loaded_extensions)
{
  bool zendext = false;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|b", &zendext) == FAILURE) {
    RETURN_THROWS();
  }

  array_init(return_value);

  if (zendext) {
    zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) add_zendext_info, return_value);
  } else {
    zend_module_entry *module;

    ZEND_HASH_MAP_FOREACH_PTR(&module_registry, module) {
      add_next_index_string(return_value, module->name);
    } ZEND_HASH_FOREACH_END();
  }
}
/* }}} */

/* {{{ Return an array containing the names and values of all defined constants */
ZEND_FUNCTION(get_defined_constants)
{
  bool categorize = false;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|b", &categorize) == FAILURE) {
    RETURN_THROWS();
  }

  array_init(return_value);

  if (categorize) {
    zend_constant *val;
    int module_number;
    zval *modules, const_val;
    char **module_names;
    zend_module_entry *module;
    int i = 1;

    modules = ecalloc(zend_hash_num_elements(&module_registry) + 2, sizeof(zval));
    module_names = emalloc((zend_hash_num_elements(&module_registry) + 2) * sizeof(char *));

    module_names[0] = "internal";
    ZEND_HASH_MAP_FOREACH_PTR(&module_registry, module) {
      module_names[module->module_number] = (char *)module->name;
      i++;
    } ZEND_HASH_FOREACH_END();
    module_names[i] = "user";

    ZEND_HASH_MAP_FOREACH_PTR(EG(zend_constants), val) {
      if (!val->name) {
        /* skip special constants */
        continue;
      }

      if (ZEND_CONSTANT_MODULE_NUMBER(val) == PHP_USER_CONSTANT) {
        module_number = i;
      } else if (ZEND_CONSTANT_MODULE_NUMBER(val) > i) {
        /* should not happen */
        continue;
      } else {
        module_number = ZEND_CONSTANT_MODULE_NUMBER(val);
      }

      if (Z_TYPE(modules[module_number]) == IS_UNDEF) {
        array_init(&modules[module_number]);
        add_assoc_zval(return_value, module_names[module_number], &modules[module_number]);
      }

      ZVAL_COPY_OR_DUP(&const_val, &val->value);
      zend_hash_add_new(Z_ARRVAL(modules[module_number]), val->name, &const_val);
    } ZEND_HASH_FOREACH_END();

    efree(module_names);
    efree(modules);
  } else {
    zend_constant *constant;
    zval const_val;

    ZEND_HASH_MAP_FOREACH_PTR(EG(zend_constants), constant) {
      if (!constant->name) {
        /* skip special constants */
        continue;
      }
      ZVAL_COPY_OR_DUP(&const_val, &constant->value);
      zend_hash_add_new(Z_ARRVAL_P(return_value), constant->name, &const_val);
    } ZEND_HASH_FOREACH_END();
  }
}
/* }}} */

static bool backtrace_is_arg_sensitive(const zend_execute_data *call, uint32_t offset)
{
  const zend_attribute *attribute = zend_get_parameter_attribute_str(
    call->func->common.attributes,
    "sensitiveparameter",
    sizeof("sensitiveparameter") - 1,
    offset
  );

  return attribute != NULL;
}

static void debug_backtrace_get_args(zend_execute_data *call, zval *arg_array) /* {{{ */
{
  uint32_t num_args = ZEND_CALL_NUM_ARGS(call);

  if (num_args) {
    uint32_t i = 0;
    zval *p = ZEND_CALL_ARG(call, 1);

    array_init_size(arg_array, num_args);
    zend_hash_real_init_packed(Z_ARRVAL_P(arg_array));
    ZEND_HASH_FILL_PACKED(Z_ARRVAL_P(arg_array)) {
      if (call->func->type == ZEND_USER_FUNCTION) {
        uint32_t first_extra_arg = MIN(num_args, call->func->op_array.num_args);

        if (UNEXPECTED(ZEND_CALL_INFO(call) & ZEND_CALL_HAS_SYMBOL_TABLE)) {
          /* In case of attached symbol_table, values on stack may be invalid
           * and we have to access them through symbol_table
           * See: https://bugs.php.net/bug.php?id=73156
           */
          while (i < first_extra_arg) {
            zend_string *arg_name = call->func->op_array.vars[i];
            zval original_arg;
            zval *arg = zend_hash_find_ex_ind(call->symbol_table, arg_name, 1);
            bool is_sensitive = backtrace_is_arg_sensitive(call, i);

            if (arg) {
              ZVAL_DEREF(arg);
              ZVAL_COPY_VALUE(&original_arg, arg);
            } else {
              ZVAL_NULL(&original_arg);
            }

            if (is_sensitive) {
              zval redacted_arg;
              object_init_with_constructor(&redacted_arg, zend_ce_sensitive_parameter_value, 1, &original_arg, NULL);
              ZEND_HASH_FILL_SET(&redacted_arg);
            } else {
              Z_TRY_ADDREF_P(&original_arg);
              ZEND_HASH_FILL_SET(&original_arg);
            }

            ZEND_HASH_FILL_NEXT();
            i++;
          }
        } else {
          while (i < first_extra_arg) {
            zval original_arg;
            bool is_sensitive = backtrace_is_arg_sensitive(call, i);

            if (EXPECTED(Z_TYPE_INFO_P(p) != IS_UNDEF)) {
              zval *arg = p;
              ZVAL_DEREF(arg);
              ZVAL_COPY_VALUE(&original_arg, arg);
            } else {
              ZVAL_NULL(&original_arg);
            }

            if (is_sensitive) {
              zval redacted_arg;
              object_init_with_constructor(&redacted_arg, zend_ce_sensitive_parameter_value, 1, &original_arg, NULL);
              ZEND_HASH_FILL_SET(&redacted_arg);
            } else {
              Z_TRY_ADDREF_P(&original_arg);
              ZEND_HASH_FILL_SET(&original_arg);
            }

            ZEND_HASH_FILL_NEXT();
            p++;
            i++;
          }
        }
        p = ZEND_CALL_VAR_NUM(call, call->func->op_array.last_var + call->func->op_array.T);
      }

      while (i < num_args) {
        zval original_arg;
        bool is_sensitive = 0;

        if (i < call->func->common.num_args || call->func->common.fn_flags & ZEND_ACC_VARIADIC) {
          is_sensitive = backtrace_is_arg_sensitive(call, MIN(i, call->func->common.num_args));
        }

        if (EXPECTED(Z_TYPE_INFO_P(p) != IS_UNDEF)) {
          zval *arg = p;
          ZVAL_DEREF(arg);
          ZVAL_COPY_VALUE(&original_arg, arg);
        } else {
          ZVAL_NULL(&original_arg);
        }

        if (is_sensitive) {
          zval redacted_arg;
          object_init_with_constructor(&redacted_arg, zend_ce_sensitive_parameter_value, 1, &original_arg, NULL);
          ZEND_HASH_FILL_SET(&redacted_arg);
        } else {
          Z_TRY_ADDREF_P(&original_arg);
          ZEND_HASH_FILL_SET(&original_arg);
        }

        ZEND_HASH_FILL_NEXT();
        p++;
        i++;
      }
    } ZEND_HASH_FILL_END();
    Z_ARRVAL_P(arg_array)->nNumOfElements = num_args;
  } else {
    ZVAL_EMPTY_ARRAY(arg_array);
  }

  if ((ZEND_CALL_INFO(call) & ZEND_CALL_HAS_EXTRA_NAMED_PARAMS)
   /* __call and __callStatic are non-variadic, potentially with
    * HAS_EXTRA_NAMED_PARAMS set. Don't add extra args, as they're already
    * contained in the 2nd param. */
   && (call->func->common.fn_flags & ZEND_ACC_VARIADIC)) {
    zend_string *name;
    zval *arg;

    bool is_sensitive = backtrace_is_arg_sensitive(call, call->func->common.num_args);

    SEPARATE_ARRAY(arg_array);
    ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(call->extra_named_params, name, arg) {
      ZVAL_DEREF(arg);
      if (is_sensitive) {
        zval redacted_arg;
        object_init_with_constructor(&redacted_arg, zend_ce_sensitive_parameter_value, 1, arg, NULL);
        zend_hash_add_new(Z_ARRVAL_P(arg_array), name, &redacted_arg);
      } else {
        Z_TRY_ADDREF_P(arg);
        zend_hash_add_new(Z_ARRVAL_P(arg_array), name, arg);
      }
    } ZEND_HASH_FOREACH_END();
  }
}
/* }}} */

/* {{{ */
ZEND_FUNCTION(debug_print_backtrace)
{
  zend_long options = 0;
  zend_long limit = 0;
  zval backtrace;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|ll", &options, &limit) == FAILURE) {
    RETURN_THROWS();
  }

  zend_fetch_debug_backtrace(&backtrace, 1, options, limit);
  ZEND_ASSERT(Z_TYPE(backtrace) == IS_ARRAY);

  zend_string *str = zend_trace_to_string(Z_ARRVAL(backtrace), /* include_main */ false);
  ZEND_WRITE(ZSTR_VAL(str), ZSTR_LEN(str));
  zend_string_release(str);
  zval_ptr_dtor(&backtrace);
}

/* }}} */

ZEND_API void zend_fetch_debug_backtrace(zval *return_value, int skip_last, int options, int limit) /* {{{ */
{
  zend_execute_data *call, *last_call = NULL;
  zend_object *object;
  bool fake_frame = false;
  int frameno = 0;
  zend_function *func;
  zend_string *filename;
  zend_string *include_filename = NULL;
  zval tmp;
  HashTable *stack_frame, *prev_stack_frame = NULL;

  array_init(return_value);

  call = EG(current_execute_data);
  if (!call) {
    return;
  }

  if (EG(filename_override)) {
    // Add the current execution point to the frame so we don't lose it
    zend_string *filename_override = EG(filename_override);
    zend_long lineno_override = EG(lineno_override);
    EG(filename_override) = NULL;
    EG(lineno_override) = -1;

    zend_string *executed_filename = zend_get_executed_filename_ex();
    uint32_t lineno = zend_get_executed_lineno();
    if (executed_filename && (!zend_string_equals(executed_filename, filename_override) || lineno != lineno_override)) {
      stack_frame = zend_new_array(8);
      zend_hash_real_init_mixed(stack_frame);
      ZVAL_STR_COPY(&tmp, executed_filename);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FILE), &tmp, 1);
      ZVAL_LONG(&tmp, lineno);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_LINE), &tmp, 1);
      ZVAL_STR_COPY(&tmp, ZSTR_KNOWN(ZEND_STR_CONST_EXPR_PLACEHOLDER));
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FUNCTION), &tmp, 1);
      ZVAL_ARR(&tmp, stack_frame);
      zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), &tmp);
    }

    EG(filename_override) = filename_override;
    EG(lineno_override) = lineno_override;
  }

  if (skip_last) {
    /* skip debug_backtrace() */
    last_call = call;
    call = call->prev_execute_data;
  }

  while (call && (limit == 0 || frameno < limit)) {
    if (UNEXPECTED(!call->func)) {
      /* This is the fake frame inserted for nested generators. Normally,
       * this frame is preceded by the actual generator frame and then
       * replaced by zend_generator_check_placeholder_frame() below.
       * However, the frame is popped before cleaning the stack frame,
       * which is observable by destructors. */
      call = zend_generator_check_placeholder_frame(call);
      ZEND_ASSERT(call->func);
    }

    zend_execute_data *prev = call->prev_execute_data;

    if (!prev) {
      /* add frame for a handler call without {main} code */
      if (EXPECTED((ZEND_CALL_INFO(call) & ZEND_CALL_TOP_FUNCTION) == 0)) {
        break;
      }
    } else if (UNEXPECTED((ZEND_CALL_INFO(call) & ZEND_CALL_GENERATOR) != 0)) {
      prev = zend_generator_check_placeholder_frame(prev);
    }

    /* For frameless calls we add an additional frame for the call itself. */
    if (ZEND_USER_CODE(call->func->type)) {
      const zend_op *opline = call->opline;
      if (!ZEND_OP_IS_FRAMELESS_ICALL(opline->opcode)) {
        goto not_frameless_call;
      }
      int num_args = ZEND_FLF_NUM_ARGS(opline->opcode);
      /* Check if any args were already freed. Skip the frame in that case. */
      if (num_args >= 1) {
        zval *arg = zend_get_zval_ptr(opline, opline->op1_type, &opline->op1, call);
        if (Z_TYPE_P(arg) == IS_UNDEF) goto not_frameless_call;
      }
      if (num_args >= 2) {
        zval *arg = zend_get_zval_ptr(opline, opline->op2_type, &opline->op2, call);
        if (Z_TYPE_P(arg) == IS_UNDEF) goto not_frameless_call;
      }
      if (num_args >= 3) {
        const zend_op *op_data = opline + 1;
        zval *arg = zend_get_zval_ptr(op_data, op_data->op1_type, &op_data->op1, call);
        if (Z_TYPE_P(arg) == IS_UNDEF) goto not_frameless_call;
      }
      zend_function *frameless_func = ZEND_FLF_FUNC(opline);
      /* Assume frameless functions are not recursive with themselves.
       * This condition may be true when observers are enabled:
       * Observers will put a call frame on top of the frameless opcode. */
      if (last_call && last_call->func == frameless_func) {
        goto not_frameless_call;
      }
      stack_frame = zend_new_array(8);
      zend_hash_real_init_mixed(stack_frame);
      ZVAL_STR_COPY(&tmp, frameless_func->common.function_name);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FUNCTION), &tmp, 1);
      /* Steal file and line from the previous frame. */
      if (call->func && ZEND_USER_CODE(call->func->common.type)) {
        uint32_t lineno;

        filename = call->func->op_array.filename;
        if (call->opline->opcode == ZEND_HANDLE_EXCEPTION) {
          if (EG(opline_before_exception)) {
            lineno = EG(opline_before_exception)->lineno;
          } else {
            lineno = call->func->op_array.line_end;
          }
        } else {
          lineno = call->opline->lineno;
        }
        ZVAL_STR_COPY(&tmp, filename);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FILE), &tmp, 1);
        ZVAL_LONG(&tmp, lineno);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_LINE), &tmp, 1);
        if (prev_stack_frame) {
          zend_hash_del(prev_stack_frame, ZSTR_KNOWN(ZEND_STR_FILE));
          zend_hash_del(prev_stack_frame, ZSTR_KNOWN(ZEND_STR_LINE));
        }
      }
      if ((options & DEBUG_BACKTRACE_IGNORE_ARGS) == 0) {
        HashTable *args = zend_new_array(8);
        zend_hash_real_init_mixed(args);
        if (num_args >= 1) {
          zval *arg = zend_get_zval_ptr(opline, opline->op1_type, &opline->op1, call);
          Z_TRY_ADDREF_P(arg);
          zend_hash_next_index_insert_new(args, arg);
        }
        if (num_args >= 2) {
          zval *arg = zend_get_zval_ptr(opline, opline->op2_type, &opline->op2, call);
          Z_TRY_ADDREF_P(arg);
          zend_hash_next_index_insert_new(args, arg);
        }
        if (num_args >= 3) {
          const zend_op *op_data = opline + 1;
          zval *arg = zend_get_zval_ptr(op_data, op_data->op1_type, &op_data->op1, call);
          Z_TRY_ADDREF_P(arg);
          zend_hash_next_index_insert_new(args, arg);
        }
        ZVAL_ARR(&tmp, args);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_ARGS), &tmp, 1);
      }
      ZVAL_ARR(&tmp, stack_frame);
      zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), &tmp);
    }
not_frameless_call:

    /* We use _zend_hash_append*() and the array must be preallocated */
    stack_frame = zend_new_array(8);
    zend_hash_real_init_mixed(stack_frame);

    if (prev && prev->func && ZEND_USER_CODE(prev->func->common.type)) {
      uint32_t lineno;

      filename = prev->func->op_array.filename;
      if (prev->opline->opcode == ZEND_HANDLE_EXCEPTION) {
        if (EG(opline_before_exception)) {
          lineno = EG(opline_before_exception)->lineno;
        } else {
          lineno = prev->func->op_array.line_end;
        }
      } else {
        lineno = prev->opline->lineno;
      }
      ZVAL_STR_COPY(&tmp, filename);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FILE), &tmp, 1);
      ZVAL_LONG(&tmp, lineno);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_LINE), &tmp, 1);

      /* try to fetch args only if an FCALL was just made - elsewise we're in the middle of a function
       * and debug_backtrace() might have been called by the error_handler. in this case we don't
       * want to pop anything of the argument-stack */
    } else {
      zend_execute_data *prev_call = prev;

      while (prev_call) {
        zend_execute_data *prev;

        if (prev_call &&
          prev_call->func &&
          !ZEND_USER_CODE(prev_call->func->common.type) &&
          !(prev_call->func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
          break;
        }

        prev = prev_call->prev_execute_data;
        if (prev && prev->func && ZEND_USER_CODE(prev->func->common.type)) {
          ZVAL_STR_COPY(&tmp, prev->func->op_array.filename);
          _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FILE), &tmp, 1);
          ZVAL_LONG(&tmp, prev->opline->lineno);
          _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_LINE), &tmp, 1);
          break;
        }
        prev_call = prev;
      }
      filename = NULL;
    }

    func = call->func;
    if (!fake_frame && func->common.function_name) {
      ZVAL_STR_COPY(&tmp, func->common.function_name);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FUNCTION), &tmp, 1);

      if (Z_TYPE(call->This) == IS_OBJECT) {
        object = Z_OBJ(call->This);
        /* $this may be passed into regular internal functions */
        if (func->common.scope) {
          ZVAL_STR_COPY(&tmp, func->common.scope->name);
        } else if (object->handlers->get_class_name == zend_std_get_class_name) {
          ZVAL_STR_COPY(&tmp, object->ce->name);
        } else {
          ZVAL_STR(&tmp, object->handlers->get_class_name(object));
        }
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_CLASS), &tmp, 1);
        if ((options & DEBUG_BACKTRACE_PROVIDE_OBJECT) != 0) {
          ZVAL_OBJ_COPY(&tmp, object);
          _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_OBJECT), &tmp, 1);
        }

        ZVAL_INTERNED_STR(&tmp, ZSTR_KNOWN(ZEND_STR_OBJECT_OPERATOR));
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_TYPE), &tmp, 1);
      } else if (func->common.scope) {
        ZVAL_STR_COPY(&tmp, func->common.scope->name);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_CLASS), &tmp, 1);
        ZVAL_INTERNED_STR(&tmp, ZSTR_KNOWN(ZEND_STR_PAAMAYIM_NEKUDOTAYIM));
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_TYPE), &tmp, 1);
      }

      if ((options & DEBUG_BACKTRACE_IGNORE_ARGS) == 0 &&
        func->type != ZEND_EVAL_CODE) {

        debug_backtrace_get_args(call, &tmp);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_ARGS), &tmp, 1);
      }
    } else {
      /* i know this is kinda ugly, but i'm trying to avoid extra cycles in the main execution loop */
      bool build_filename_arg = true;
      zend_string *pseudo_function_name;
      uint32_t include_kind = 0;
      if (prev && prev->func && ZEND_USER_CODE(prev->func->common.type) && prev->opline->opcode == ZEND_INCLUDE_OR_EVAL) {
        include_kind = prev->opline->extended_value;
      }

      switch (include_kind) {
        case ZEND_EVAL:
          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_EVAL);
          build_filename_arg = false;
          break;
        case ZEND_INCLUDE:
          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_INCLUDE);
          break;
        case ZEND_REQUIRE:
          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_REQUIRE);
          break;
        case ZEND_INCLUDE_ONCE:
          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_INCLUDE_ONCE);
          break;
        case ZEND_REQUIRE_ONCE:
          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_REQUIRE_ONCE);
          break;
        default:
          /* Skip dummy frame unless it is needed to preserve filename/lineno info. */
          if (!filename) {
            zend_array_destroy(stack_frame);
            goto skip_frame;
          }

          pseudo_function_name = ZSTR_KNOWN(ZEND_STR_UNKNOWN);
          build_filename_arg = false;
          break;
      }

      if (build_filename_arg && include_filename) {
        zval arg_array;

        array_init(&arg_array);

        /* include_filename always points to the last filename of the last last called-function.
           if we have called include in the frame above - this is the file we have included.
         */

        ZVAL_STR_COPY(&tmp, include_filename);
        zend_hash_next_index_insert_new(Z_ARRVAL(arg_array), &tmp);
        _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_ARGS), &arg_array, 1);
      }

      ZVAL_INTERNED_STR(&tmp, pseudo_function_name);
      _zend_hash_append_ex(stack_frame, ZSTR_KNOWN(ZEND_STR_FUNCTION), &tmp, 1);
    }

    ZVAL_ARR(&tmp, stack_frame);
    zend_hash_next_index_insert_new(Z_ARRVAL_P(return_value), &tmp);
    frameno++;
    prev_stack_frame = stack_frame;

skip_frame:
    if (UNEXPECTED(ZEND_CALL_KIND(call) == ZEND_CALL_TOP_FUNCTION)
     && !fake_frame
     && prev
     && prev->func
     && ZEND_USER_CODE(prev->func->common.type)
     && prev->opline->opcode == ZEND_INCLUDE_OR_EVAL) {
      fake_frame = true;
    } else {
      fake_frame = false;
      include_filename = filename;
      last_call = call;
      call = prev;
    }
  }
}
/* }}} */

/* {{{ Return backtrace as array */
ZEND_FUNCTION(debug_backtrace)
{
  zend_long options = DEBUG_BACKTRACE_PROVIDE_OBJECT;
  zend_long limit = 0;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "|ll", &options, &limit) == FAILURE) {
    RETURN_THROWS();
  }

  zend_fetch_debug_backtrace(return_value, 1, options, limit);
}
/* }}} */

/* {{{ Returns true if the named extension is loaded */
ZEND_FUNCTION(extension_loaded)
{
  zend_string *extension_name;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &extension_name) == FAILURE) {
    RETURN_THROWS();
  }

  RETURN_BOOL(zend_hash_find_ptr_lc(&module_registry, extension_name) != NULL);
}
/* }}} */

/* {{{ Returns an array with the names of functions belonging to the named extension */
ZEND_FUNCTION(get_extension_funcs)
{
  zend_string *extension_name;
  bool array;
  zend_module_entry *module;
  zend_function *zif;

  if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &extension_name) == FAILURE) {
    RETURN_THROWS();
  }
  if (strncasecmp(ZSTR_VAL(extension_name), "zend", sizeof("zend"))) {
    module = zend_hash_find_ptr_lc(&module_registry, extension_name);
  } else {
    module = zend_hash_str_find_ptr(&module_registry, "core", sizeof("core") - 1);
  }

  if (!module) {
    RETURN_FALSE;
  }

  if (module->functions) {
    /* avoid BC break, if functions list is empty, will return an empty array */
    array_init(return_value);
    array = true;
  } else {
    array = false;
  }

  ZEND_HASH_MAP_FOREACH_PTR(CG(function_table), zif) {
    if (zif->common.type == ZEND_INTERNAL_FUNCTION
      && zif->internal_function.module == module) {
      if (!array) {
        array_init(return_value);
        array = true;
      }
      add_next_index_str(return_value, zend_string_copy(zif->common.function_name));
    }
  } ZEND_HASH_FOREACH_END();

  if (!array) {
    RETURN_FALSE;
  }
}
/* }}} */

Coverage Report

Created: 2026-09-14 06:25