/src/php-src/ext/json/json_encoder.c

Source
/*
  +----------------------------------------------------------------------+
  | Copyright © The PHP Group 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                                |
  +----------------------------------------------------------------------+
  | Author: Omar Kilani <omar@php.net>                                   |
  |         Jakub Zelenka <bukka@php.net>                                |
  +----------------------------------------------------------------------+
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "php.h"
#include "ext/standard/html.h"
#include "zend_smart_str.h"
#include "php_json.h"
#include "php_json_encoder.h"
#include "zend_portability.h"
#include <zend_exceptions.h>
#include "zend_enum.h"
#include "zend_property_hooks.h"
#include "zend_lazy_objects.h"

static const char digits[] = "0123456789abcdef";

static zend_always_inline bool php_json_check_stack_limit(void)
{
#ifdef ZEND_CHECK_STACK_LIMIT
  return zend_call_stack_overflowed(EG(stack_limit));
#else
  return false;
#endif
}

/* {{{ Pretty printing support functions */

static inline void php_json_pretty_print_char(smart_str *buf, int options, char c) /* {{{ */
{
  if (options & PHP_JSON_PRETTY_PRINT) {
    smart_str_appendc(buf, c);
  }
}
/* }}} */

static inline void php_json_pretty_print_indent(smart_str *buf, int options, const php_json_encoder *encoder) /* {{{ */
{
  if (options & PHP_JSON_PRETTY_PRINT) {
    smart_str_alloc(buf, encoder->depth * 4, 0);
    for (int i = 0; i < encoder->depth; ++i) {
      smart_str_appendl(buf, "    ", 4);
    }
  }
}
/* }}} */

/* }}} */

static
#if defined(_MSC_VER) && defined(_M_ARM64)
// MSVC bug: https://developercommunity.visualstudio.com/t/corrupt-optimization-on-arm64-with-Ox-/10102551
zend_never_inline
#else
inline
#endif
bool php_json_is_valid_double(double d) /* {{{ */
{
  return !zend_isinf(d) && !zend_isnan(d);
}
/* }}} */

static inline void php_json_encode_double(smart_str *buf, double d, int options) /* {{{ */
{
  size_t len;
  char num[ZEND_DOUBLE_MAX_LENGTH];

  zend_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
  len = strlen(num);
  if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < ZEND_DOUBLE_MAX_LENGTH - 2) {
    num[len++] = '.';
    num[len++] = '0';
    num[len] = '\0';
  }
  smart_str_appendl(buf, num, len);
}
/* }}} */

#define PHP_JSON_HASH_PROTECT_RECURSION(_tmp_ht) \
  do { \
    if (_tmp_ht) { \
      GC_TRY_PROTECT_RECURSION(_tmp_ht); \
    } \
  } while (0)

#define PHP_JSON_HASH_UNPROTECT_RECURSION(_tmp_ht) \
  do { \
    if (_tmp_ht) { \
      GC_TRY_UNPROTECT_RECURSION(_tmp_ht); \
    } \
  } while (0)

static zend_result php_json_encode_array(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
{
  bool encode_as_object = options & PHP_JSON_FORCE_OBJECT;
  HashTable *myht, *prop_ht;
  zend_refcounted *recursion_rc;

  if (php_json_check_stack_limit()) {
    encoder->error_code = PHP_JSON_ERROR_DEPTH;
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    return FAILURE;
  }

  if (Z_TYPE_P(val) == IS_ARRAY) {
    myht = Z_ARRVAL_P(val);
    recursion_rc = (zend_refcounted *)myht;
    prop_ht = NULL;
    encode_as_object = encode_as_object || !zend_array_is_list(myht);
  } else if (Z_OBJ_P(val)->properties == NULL
   && Z_OBJ_HT_P(val)->get_properties_for == NULL
   && Z_OBJ_HT_P(val)->get_properties == zend_std_get_properties
   && Z_OBJ_P(val)->ce->num_hooked_props == 0
   && !zend_object_is_lazy(Z_OBJ_P(val))) {
    /* Optimized version without rebuilding properties HashTable */
    zend_object *obj = Z_OBJ_P(val);
    const zend_class_entry *ce = obj->ce;

    if (GC_IS_RECURSIVE(obj)) {
      encoder->error_code = PHP_JSON_ERROR_RECURSION;
      smart_str_appendl(buf, "null", 4);
      return FAILURE;
    }

    PHP_JSON_HASH_PROTECT_RECURSION(obj);

    smart_str_appendc(buf, '{');

    ++encoder->depth;

    for (int i = 0; i < ce->default_properties_count; i++) {
      zend_property_info *prop_info = ce->properties_info_table[i];
      if (!prop_info) {
        continue;
      }
      if (ZSTR_VAL(prop_info->name)[0] == '\0' && ZSTR_LEN(prop_info->name) > 0) {
        /* Skip protected and private members. */
        continue;
      }
      zval *prop = OBJ_PROP(obj, prop_info->offset);
      if (Z_TYPE_P(prop) == IS_UNDEF) {
        continue;
      }

      php_json_pretty_print_char(buf, options, '\n');
      php_json_pretty_print_indent(buf, options, encoder);

      if (php_json_escape_string(buf, ZSTR_VAL(prop_info->name), ZSTR_LEN(prop_info->name),
          options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
          (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
          buf->s) {
        ZSTR_LEN(buf->s) -= 4;
        smart_str_appendl(buf, "\"\"", 2);
      }

      smart_str_appendc(buf, ':');
      php_json_pretty_print_char(buf, options, ' ');

      if (php_json_encode_zval(buf, prop, options, encoder) == FAILURE &&
          !(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
        return FAILURE;
      }

      smart_str_appendc(buf, ',');
    }

    bool empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
    if (!empty) {
      /* Drop the trailing comma. */
      ZSTR_LEN(buf->s)--;
    }

    PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
    if (encoder->depth > encoder->max_depth) {
      encoder->error_code = PHP_JSON_ERROR_DEPTH;
      if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        return FAILURE;
      }
    }
    --encoder->depth;

    if (!empty) {
      php_json_pretty_print_char(buf, options, '\n');
      php_json_pretty_print_indent(buf, options, encoder);
    }
    smart_str_appendc(buf, '}');
    return SUCCESS;
  } else {
    zend_object *obj = Z_OBJ_P(val);
    prop_ht = myht = zend_get_properties_for(val, ZEND_PROP_PURPOSE_JSON);
    if (obj->ce->num_hooked_props == 0) {
      recursion_rc = (zend_refcounted *)prop_ht;
    } else {
      /* Protecting the object itself is fine here because myht is temporary and can't be
       * referenced from a different place in the object graph. */
      recursion_rc = (zend_refcounted *)obj;
    }
    encode_as_object = true;
  }

  if (recursion_rc && GC_IS_RECURSIVE(recursion_rc)) {
    encoder->error_code = PHP_JSON_ERROR_RECURSION;
    smart_str_appendl(buf, "null", 4);
    zend_release_properties(prop_ht);
    return FAILURE;
  }

  PHP_JSON_HASH_PROTECT_RECURSION(recursion_rc);

  if (!encode_as_object) {
    smart_str_appendc(buf, '[');
  } else {
    smart_str_appendc(buf, '{');
  }

  ++encoder->depth;

  uint32_t i = myht ? zend_hash_num_elements(myht) : 0;

  bool empty = true;
  if (i > 0) {
    zend_string *key;
    zval *data;
    zend_ulong index;

    ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
      bool need_dtor = false;
      zval tmp;
      ZVAL_UNDEF(&tmp);

      if (!encode_as_object) {
        ZEND_ASSERT(Z_TYPE_P(data) != IS_PTR);

        php_json_pretty_print_char(buf, options, '\n');
        php_json_pretty_print_indent(buf, options, encoder);
      } else {
        if (key) {
          if (ZSTR_VAL(key)[0] == '\0' && ZSTR_LEN(key) > 0 && Z_TYPE_P(val) == IS_OBJECT) {
            /* Skip protected and private members. */
            continue;
          }

          /* data is IS_PTR for properties with hooks. */
          if (UNEXPECTED(Z_TYPE_P(data) == IS_PTR)) {
            zend_property_info *prop_info = Z_PTR_P(data);
            if ((prop_info->flags & ZEND_ACC_VIRTUAL) && !prop_info->hooks[ZEND_PROPERTY_HOOK_GET]) {
              continue;
            }
            need_dtor = true;
            data = zend_read_property_ex(prop_info->ce, Z_OBJ_P(val), prop_info->name, /* silent */ true, &tmp);
            if (EG(exception)) {
              PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
              zend_release_properties(prop_ht);
              zval_ptr_dtor(&tmp);
              return FAILURE;
            }
          }


          php_json_pretty_print_char(buf, options, '\n');
          php_json_pretty_print_indent(buf, options, encoder);

          if (php_json_escape_string(buf, ZSTR_VAL(key), ZSTR_LEN(key),
                options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
              (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
              buf->s) {
            ZSTR_LEN(buf->s) -= 4;
            smart_str_appendl(buf, "\"\"", 2);
          }
        } else {
          php_json_pretty_print_char(buf, options, '\n');
          php_json_pretty_print_indent(buf, options, encoder);

          smart_str_appendc(buf, '"');
          smart_str_append_long(buf, (zend_long) index);
          smart_str_appendc(buf, '"');
        }

        smart_str_appendc(buf, ':');
        php_json_pretty_print_char(buf, options, ' ');
      }

      if (php_json_encode_zval(buf, data, options, encoder) == FAILURE &&
          !(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
        PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
        zend_release_properties(prop_ht);
        zval_ptr_dtor(&tmp);
        return FAILURE;
      }
      if (UNEXPECTED(need_dtor)) {
        zval_ptr_dtor(&tmp);
      }

      smart_str_appendc(buf, ',');
    } ZEND_HASH_FOREACH_END();

    empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
    if (!empty) {
      /* Drop the trailing comma. */
      ZSTR_LEN(buf->s)--;
    }
  }

  PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);

  if (encoder->depth > encoder->max_depth) {
    encoder->error_code = PHP_JSON_ERROR_DEPTH;
    if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
      zend_release_properties(prop_ht);
      return FAILURE;
    }
  }
  --encoder->depth;

  /* Only keep closing bracket on same line for empty arrays/objects */
  if (!empty) {
    php_json_pretty_print_char(buf, options, '\n');
    php_json_pretty_print_indent(buf, options, encoder);
  }

  if (!encode_as_object) {
    smart_str_appendc(buf, ']');
  } else {
    smart_str_appendc(buf, '}');
  }

  zend_release_properties(prop_ht);
  return SUCCESS;
}
/* }}} */

zend_result php_json_escape_string(
    smart_str *buf, const char *s, size_t len,
    int options, php_json_encoder *encoder) /* {{{ */
{
  size_t pos, checkpoint;
  char *dst;

  if (len == 0) {
    smart_str_appendl(buf, "\"\"", 2);
    return SUCCESS;
  }

  if (options & PHP_JSON_NUMERIC_CHECK) {
    double d;
    int type;
    zend_long p;

    if ((type = is_numeric_string(s, len, &p, &d, 0)) != 0) {
      if (type == IS_LONG) {
        smart_str_append_long(buf, p);
        return SUCCESS;
      } else if (type == IS_DOUBLE && php_json_is_valid_double(d)) {
        php_json_encode_double(buf, d, options);
        return SUCCESS;
      }
    }

  }
  checkpoint = buf->s ? ZSTR_LEN(buf->s) : 0;

  /* pre-allocate for string length plus 2 quotes */
  smart_str_alloc(buf, len+2, 0);
  smart_str_appendc(buf, '"');

  pos = 0;

  do {
    static const uint32_t charmap[8] = {
      0xffffffff, 0x500080c4, 0x10000000, 0x00000000,
      0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff};

    unsigned int us = (unsigned char)s[pos];
    if (EXPECTED(!ZEND_BIT_TEST(charmap, us))) {
      pos++;
      len--;
      if (len == 0) {
        smart_str_appendl(buf, s, pos);
        break;
      }
    } else {
      if (pos) {
        smart_str_appendl(buf, s, pos);
        s += pos;
        pos = 0;
      }
      us = (unsigned char)s[0];
      if (UNEXPECTED(us >= 0x80)) {
        zend_result status;
        us = php_next_utf8_char((unsigned char *)s, len, &pos, &status);

        /* check whether UTF8 character is correct */
        if (UNEXPECTED(status != SUCCESS)) {
          if (options & PHP_JSON_INVALID_UTF8_IGNORE) {
            /* ignore invalid UTF8 character */
          } else if (options & PHP_JSON_INVALID_UTF8_SUBSTITUTE) {
            /* Use Unicode character 'REPLACEMENT CHARACTER' (U+FFFD) */
            if (options & PHP_JSON_UNESCAPED_UNICODE) {
              smart_str_appendl(buf, "\xef\xbf\xbd", 3);
            } else {
              smart_str_appendl(buf, "\\ufffd", 6);
            }
          } else {
            ZSTR_LEN(buf->s) = checkpoint;
            encoder->error_code = PHP_JSON_ERROR_UTF8;
            if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
              smart_str_appendl(buf, "null", 4);
            }
            return FAILURE;
          }

        /* Escape U+2028/U+2029 line terminators, UNLESS both
           JSON_UNESCAPED_UNICODE and
           JSON_UNESCAPED_LINE_TERMINATORS were provided */
        } else if ((options & PHP_JSON_UNESCAPED_UNICODE)
            && ((options & PHP_JSON_UNESCAPED_LINE_TERMINATORS)
            || us < 0x2028 || us > 0x2029)) {
          smart_str_appendl(buf, s, pos);
        } else {
          /* From http://en.wikipedia.org/wiki/UTF16 */
          if (us >= 0x10000) {
            unsigned int next_us;

            us -= 0x10000;
            next_us = (unsigned short)((us & 0x3ff) | 0xdc00);
            us = (unsigned short)((us >> 10) | 0xd800);
            dst = smart_str_extend(buf, 6);
            dst[0] = '\\';
            dst[1] = 'u';
            dst[2] = digits[(us >> 12) & 0xf];
            dst[3] = digits[(us >> 8) & 0xf];
            dst[4] = digits[(us >> 4) & 0xf];
            dst[5] = digits[us & 0xf];
            us = next_us;
          }
          dst = smart_str_extend(buf, 6);
          dst[0] = '\\';
          dst[1] = 'u';
          dst[2] = digits[(us >> 12) & 0xf];
          dst[3] = digits[(us >> 8) & 0xf];
          dst[4] = digits[(us >> 4) & 0xf];
          dst[5] = digits[us & 0xf];
        }
        s += pos;
        len -= pos;
        pos = 0;
      } else {
        s++;
        switch (us) {
          case '"':
            if (options & PHP_JSON_HEX_QUOT) {
              smart_str_appendl(buf, "\\u0022", 6);
            } else {
              smart_str_appendl(buf, "\\\"", 2);
            }
            break;

          case '\\':
            smart_str_appendl(buf, "\\\\", 2);
            break;

          case '/':
            if (options & PHP_JSON_UNESCAPED_SLASHES) {
              smart_str_appendc(buf, '/');
            } else {
              smart_str_appendl(buf, "\\/", 2);
            }
            break;

          case '\b':
            smart_str_appendl(buf, "\\b", 2);
            break;

          case '\f':
            smart_str_appendl(buf, "\\f", 2);
            break;

          case '\n':
            smart_str_appendl(buf, "\\n", 2);
            break;

          case '\r':
            smart_str_appendl(buf, "\\r", 2);
            break;

          case '\t':
            smart_str_appendl(buf, "\\t", 2);
            break;

          case '<':
            if (options & PHP_JSON_HEX_TAG) {
              smart_str_appendl(buf, "\\u003C", 6);
            } else {
              smart_str_appendc(buf, '<');
            }
            break;

          case '>':
            if (options & PHP_JSON_HEX_TAG) {
              smart_str_appendl(buf, "\\u003E", 6);
            } else {
              smart_str_appendc(buf, '>');
            }
            break;

          case '&':
            if (options & PHP_JSON_HEX_AMP) {
              smart_str_appendl(buf, "\\u0026", 6);
            } else {
              smart_str_appendc(buf, '&');
            }
            break;

          case '\'':
            if (options & PHP_JSON_HEX_APOS) {
              smart_str_appendl(buf, "\\u0027", 6);
            } else {
              smart_str_appendc(buf, '\'');
            }
            break;

          default:
            ZEND_ASSERT(us < ' ');
            dst = smart_str_extend(buf, 6);
            dst[0] = '\\';
            dst[1] = 'u';
            dst[2] = '0';
            dst[3] = '0';
            dst[4] = digits[(us >> 4) & 0xf];
            dst[5] = digits[us & 0xf];
            break;
        }
        len--;
      }
    }
  } while (len);

  smart_str_appendc(buf, '"');

  return SUCCESS;
}
/* }}} */

static zend_result php_json_encode_serializable_object(smart_str *buf, zend_object *obj, int options, php_json_encoder *encoder)
{
  zend_class_entry *ce = obj->ce;
  uint32_t *guard = zend_get_recursion_guard(obj);
  zval retval;
  zend_result return_code;

  ZEND_ASSERT(guard != NULL);

  if (ZEND_GUARD_IS_RECURSIVE(guard, JSON)) {
    encoder->error_code = PHP_JSON_ERROR_RECURSION;
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    return FAILURE;
  }

  ZEND_GUARD_PROTECT_RECURSION(guard, JSON);

  /* jsonSerialize() may drop the last reference to the object, e.g. by
   * nulling a reference that aliases the encoded array slot; keep it alive
   * so the recursion guard and the identity check below stay valid. */
  GC_ADDREF(obj);

  zend_function *json_serialize_method = zend_hash_str_find_ptr(&ce->function_table, ZEND_STRL("jsonserialize"));
  ZEND_ASSERT(json_serialize_method != NULL && "This should be guaranteed prior to calling this function");
  zend_call_known_function(json_serialize_method, obj, ce, &retval, 0, NULL, NULL);
  /* An exception has occurred */
  if (Z_TYPE(retval) == IS_UNDEF) {
    if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
      smart_str_appendl(buf, "null", 4);
    }
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
    OBJ_RELEASE(obj);
    return FAILURE;
  }

  if (Z_TYPE(retval) == IS_OBJECT && Z_OBJ(retval) == obj) {
    /* Handle the case where jsonSerialize does: return $this; by going straight to encode array */
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
    return_code = php_json_encode_array(buf, &retval, options, encoder);
  } else {
    /* All other types, encode as normal */
    return_code = php_json_encode_zval(buf, &retval, options, encoder);
    ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
  }

  zval_ptr_dtor(&retval);
  OBJ_RELEASE(obj);

  return return_code;
}

static zend_result php_json_encode_serializable_enum(smart_str *buf, zval *val, int options, php_json_encoder *encoder)
{
  const zend_class_entry *ce = Z_OBJCE_P(val);
  if (ce->enum_backing_type == IS_UNDEF) {
    encoder->error_code = PHP_JSON_ERROR_NON_BACKED_ENUM;
    smart_str_appendc(buf, '0');
    return FAILURE;
  }

  zval *value_zv = zend_enum_fetch_case_value(Z_OBJ_P(val));
  return php_json_encode_zval(buf, value_zv, options, encoder);
}

zend_result php_json_encode_zval(smart_str *buf, zval *val, int options, php_json_encoder *encoder) /* {{{ */
{
again:
  switch (Z_TYPE_P(val))
  {
    case IS_NULL:
      smart_str_appendl(buf, "null", 4);
      break;

    case IS_TRUE:
      smart_str_appendl(buf, "true", 4);
      break;
    case IS_FALSE:
      smart_str_appendl(buf, "false", 5);
      break;

    case IS_LONG:
      smart_str_append_long(buf, Z_LVAL_P(val));
      break;

    case IS_DOUBLE:
      if (php_json_is_valid_double(Z_DVAL_P(val))) {
        php_json_encode_double(buf, Z_DVAL_P(val), options);
      } else {
        encoder->error_code = PHP_JSON_ERROR_INF_OR_NAN;
        smart_str_appendc(buf, '0');
      }
      break;

    case IS_STRING:
      return php_json_escape_string(buf, Z_STRVAL_P(val), Z_STRLEN_P(val), options, encoder);

    case IS_OBJECT:
      if (instanceof_function(Z_OBJCE_P(val), php_json_serializable_ce)) {
        return php_json_encode_serializable_object(buf, Z_OBJ_P(val), options, encoder);
      }
      if (Z_OBJCE_P(val)->ce_flags & ZEND_ACC_ENUM) {
        return php_json_encode_serializable_enum(buf, val, options, encoder);
      }
      /* fallthrough -- Non-serializable object */
      ZEND_FALLTHROUGH;
    case IS_ARRAY: {
      /* Avoid modifications (and potential freeing) of the array through a reference when a
       * jsonSerialize() method is invoked. */
      zval zv;
      zend_result res;
      ZVAL_COPY(&zv, val);
      res = php_json_encode_array(buf, &zv, options, encoder);
      zval_ptr_dtor_nogc(&zv);
      return res;
    }

    case IS_REFERENCE:
      val = Z_REFVAL_P(val);
      goto again;

    default:
      encoder->error_code = PHP_JSON_ERROR_UNSUPPORTED_TYPE;
      if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
        smart_str_appendl(buf, "null", 4);
      }
      return FAILURE;
  }

  return SUCCESS;
}
/* }}} */

Coverage Report

Created: 2026-09-14 06:25

Line	Count	Source
1		/*
2		+----------------------------------------------------------------------+
3		\| Copyright © The PHP Group and Contributors. \|
4		+----------------------------------------------------------------------+
5		\| This source file is subject to the Modified BSD License that is \|
6		\| bundled with this package in the file LICENSE, and is available \|
7		\| through the World Wide Web at <https://www.php.net/license/>. \|
8		\| \|
9		\| SPDX-License-Identifier: BSD-3-Clause \|
10		+----------------------------------------------------------------------+
11		\| Author: Omar Kilani <omar@php.net> \|
12		\| Jakub Zelenka <bukka@php.net> \|
13		+----------------------------------------------------------------------+
14		*/
15
16		#ifdef HAVE_CONFIG_H
17		#include <config.h>
18		#endif
19
20		#include "php.h"
21		#include "ext/standard/html.h"
22		#include "zend_smart_str.h"
23		#include "php_json.h"
24		#include "php_json_encoder.h"
25		#include "zend_portability.h"
26		#include <zend_exceptions.h>
27		#include "zend_enum.h"
28		#include "zend_property_hooks.h"
29		#include "zend_lazy_objects.h"
30
31		static const char digits[] = "0123456789abcdef";
32
33		static zend_always_inline bool php_json_check_stack_limit(void)
34	386	{
35	386	#ifdef ZEND_CHECK_STACK_LIMIT
36	386	return zend_call_stack_overflowed(EG(stack_limit));
37		#else
38		return false;
39		#endif
40	386	}
41
42		/* {{{ Pretty printing support functions */
43
44		static inline void php_json_pretty_print_char(smart_str buf, int options, char c) / {{{ */
45	2.54k	{
46	2.54k	if (options & PHP_JSON_PRETTY_PRINT) {
47	0	smart_str_appendc(buf, c);
48	0	}
49	2.54k	}
50		/* }}} */
51
52		static inline void php_json_pretty_print_indent(smart_str buf, int options, const php_json_encoder encoder) /* {{{ */
53	2.08k	{
54	2.08k	if (options & PHP_JSON_PRETTY_PRINT) {
55	0	smart_str_alloc(buf, encoder->depth * 4, 0);
56	0	for (int i = 0; i < encoder->depth; ++i) {
57	0	smart_str_appendl(buf, " ", 4);
58	0	}
59	0	}
60	2.08k	}
61		/* }}} */
62
63		/* }}} */
64
65		static
66		#if defined(_MSC_VER) && defined(_M_ARM64)
67		// MSVC bug: https://developercommunity.visualstudio.com/t/corrupt-optimization-on-arm64-with-Ox-/10102551
68		zend_never_inline
69		#else
70		inline
71		#endif
72		bool php_json_is_valid_double(double d) /* {{{ */
73	166	{
74	166	return !zend_isinf(d) && !zend_isnan(d);
75	166	}
76		/* }}} */
77
78		static inline void php_json_encode_double(smart_str buf, double d, int options) / {{{ */
79	147	{
80	147	size_t len;
81	147	char num[ZEND_DOUBLE_MAX_LENGTH];
82
83	147	zend_gcvt(d, (int)PG(serialize_precision), '.', 'e', num);
84	147	len = strlen(num);
85	147	if (options & PHP_JSON_PRESERVE_ZERO_FRACTION && strchr(num, '.') == NULL && len < ZEND_DOUBLE_MAX_LENGTH - 2) {
86	101	num[len++] = '.';
87	101	num[len++] = '0';
88	101	num[len] = '\0';
89	101	}
90	147	smart_str_appendl(buf, num, len);
91	147	}
92		/* }}} */
93
94		#define PHP_JSON_HASH_PROTECT_RECURSION(_tmp_ht) \
95	386	do { \
96	386	if (_tmp_ht) { \
97	378	GC_TRY_PROTECT_RECURSION(_tmp_ht); \
98	378	} \
99	386	} while (0)
100
101		#define PHP_JSON_HASH_UNPROTECT_RECURSION(_tmp_ht) \
102	386	do { \
103	386	if (_tmp_ht) { \
104	378	GC_TRY_UNPROTECT_RECURSION(_tmp_ht); \
105	378	} \
106	386	} while (0)
107
108		static zend_result php_json_encode_array(smart_str buf, zval val, int options, php_json_encoder encoder) / {{{ */
109	386	{
110	386	bool encode_as_object = options & PHP_JSON_FORCE_OBJECT;
111	386	HashTable myht, prop_ht;
112	386	zend_refcounted *recursion_rc;
113
114	386	if (php_json_check_stack_limit()) {
115	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
116	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
117	0	smart_str_appendl(buf, "null", 4);
118	0	}
119	0	return FAILURE;
120	0	}
121
122	386	if (Z_TYPE_P(val) == IS_ARRAY) {
123	123	myht = Z_ARRVAL_P(val);
124	123	recursion_rc = (zend_refcounted *)myht;
125	123	prop_ht = NULL;
126	123	encode_as_object = encode_as_object \|\| !zend_array_is_list(myht);
127	263	} else if (Z_OBJ_P(val)->properties == NULL
128	98	&& Z_OBJ_HT_P(val)->get_properties_for == NULL
129	90	&& Z_OBJ_HT_P(val)->get_properties == zend_std_get_properties
130	90	&& Z_OBJ_P(val)->ce->num_hooked_props == 0
131	38	&& !zend_object_is_lazy(Z_OBJ_P(val))) {
132		/* Optimized version without rebuilding properties HashTable */
133	2	zend_object *obj = Z_OBJ_P(val);
134	2	const zend_class_entry *ce = obj->ce;
135
136	2	if (GC_IS_RECURSIVE(obj)) {
137	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
138	0	smart_str_appendl(buf, "null", 4);
139	0	return FAILURE;
140	0	}
141
142	2	PHP_JSON_HASH_PROTECT_RECURSION(obj);
143
144	2	smart_str_appendc(buf, '{');
145
146	2	++encoder->depth;
147
148	2	for (int i = 0; i < ce->default_properties_count; i++) {
149	0	zend_property_info *prop_info = ce->properties_info_table[i];
150	0	if (!prop_info) {
151	0	continue;
152	0	}
153	0	if (ZSTR_VAL(prop_info->name)[0] == '\0' && ZSTR_LEN(prop_info->name) > 0) {
154		/* Skip protected and private members. */
155	0	continue;
156	0	}
157	0	zval *prop = OBJ_PROP(obj, prop_info->offset);
158	0	if (Z_TYPE_P(prop) == IS_UNDEF) {
159	0	continue;
160	0	}
161
162	0	php_json_pretty_print_char(buf, options, '\n');
163	0	php_json_pretty_print_indent(buf, options, encoder);
164
165	0	if (php_json_escape_string(buf, ZSTR_VAL(prop_info->name), ZSTR_LEN(prop_info->name),
166	0	options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
167	0	(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
168	0	buf->s) {
169	0	ZSTR_LEN(buf->s) -= 4;
170	0	smart_str_appendl(buf, "\"\"", 2);
171	0	}
172
173	0	smart_str_appendc(buf, ':');
174	0	php_json_pretty_print_char(buf, options, ' ');
175
176	0	if (php_json_encode_zval(buf, prop, options, encoder) == FAILURE &&
177	0	!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
178	0	PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
179	0	return FAILURE;
180	0	}
181
182	0	smart_str_appendc(buf, ',');
183	0	}
184
185	2	bool empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
186	2	if (!empty) {
187		/* Drop the trailing comma. */
188	0	ZSTR_LEN(buf->s)--;
189	0	}
190
191	2	PHP_JSON_HASH_UNPROTECT_RECURSION(obj);
192	2	if (encoder->depth > encoder->max_depth) {
193	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
194	0	if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
195	0	return FAILURE;
196	0	}
197	0	}
198	2	--encoder->depth;
199
200	2	if (!empty) {
201	0	php_json_pretty_print_char(buf, options, '\n');
202	0	php_json_pretty_print_indent(buf, options, encoder);
203	0	}
204	2	smart_str_appendc(buf, '}');
205	2	return SUCCESS;
206	261	} else {
207	261	zend_object *obj = Z_OBJ_P(val);
208	261	prop_ht = myht = zend_get_properties_for(val, ZEND_PROP_PURPOSE_JSON);
209	261	if (obj->ce->num_hooked_props == 0) {
210	70	recursion_rc = (zend_refcounted *)prop_ht;
211	191	} else {
212		/* Protecting the object itself is fine here because myht is temporary and can't be
213		* referenced from a different place in the object graph. */
214	191	recursion_rc = (zend_refcounted *)obj;
215	191	}
216	261	encode_as_object = true;
217	261	}
218
219	384	if (recursion_rc && GC_IS_RECURSIVE(recursion_rc)) {
220	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
221	0	smart_str_appendl(buf, "null", 4);
222	0	zend_release_properties(prop_ht);
223	0	return FAILURE;
224	0	}
225
226	384	PHP_JSON_HASH_PROTECT_RECURSION(recursion_rc);
227
228	384	if (!encode_as_object) {
229	116	smart_str_appendc(buf, '[');
230	268	} else {
231	268	smart_str_appendc(buf, '{');
232	268	}
233
234	384	++encoder->depth;
235
236	384	uint32_t i = myht ? zend_hash_num_elements(myht) : 0;
237
238	384	bool empty = true;
239	384	if (i > 0) {
240	325	zend_string *key;
241	325	zval *data;
242	325	zend_ulong index;
243
244	4.45k	ZEND_HASH_FOREACH_KEY_VAL_IND(myht, index, key, data) {
245	4.45k	bool need_dtor = false;
246	4.45k	zval tmp;
247	4.45k	ZVAL_UNDEF(&tmp);
248
249	4.45k	if (!encode_as_object) {
250	1.33k	ZEND_ASSERT(Z_TYPE_P(data) != IS_PTR);
251
252	1.33k	php_json_pretty_print_char(buf, options, '\n');
253	1.33k	php_json_pretty_print_indent(buf, options, encoder);
254	1.33k	} else {
255	726	if (key) {
256	726	if (ZSTR_VAL(key)[0] == '\0' && ZSTR_LEN(key) > 0 && Z_TYPE_P(val) == IS_OBJECT) {
257		/* Skip protected and private members. */
258	193	continue;
259	193	}
260
261		/* data is IS_PTR for properties with hooks. */
262	533	if (UNEXPECTED(Z_TYPE_P(data) == IS_PTR)) {
263	363	zend_property_info *prop_info = Z_PTR_P(data);
264	363	if ((prop_info->flags & ZEND_ACC_VIRTUAL) && !prop_info->hooks[ZEND_PROPERTY_HOOK_GET]) {
265	68	continue;
266	68	}
267	295	need_dtor = true;
268	295	data = zend_read_property_ex(prop_info->ce, Z_OBJ_P(val), prop_info->name, /* silent */ true, &tmp);
269	295	if (EG(exception)) {
270	5	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
271	5	zend_release_properties(prop_ht);
272	5	zval_ptr_dtor(&tmp);
273	5	return FAILURE;
274	5	}
275	295	}
276
277
278	460	php_json_pretty_print_char(buf, options, '\n');
279	460	php_json_pretty_print_indent(buf, options, encoder);
280
281	460	if (php_json_escape_string(buf, ZSTR_VAL(key), ZSTR_LEN(key),
282	460	options & ~PHP_JSON_NUMERIC_CHECK, encoder) == FAILURE &&
283	5	(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) &&
284	0	buf->s) {
285	0	ZSTR_LEN(buf->s) -= 4;
286	0	smart_str_appendl(buf, "\"\"", 2);
287	0	}
288	460	} else {
289	0	php_json_pretty_print_char(buf, options, '\n');
290	0	php_json_pretty_print_indent(buf, options, encoder);
291
292	0	smart_str_appendc(buf, '"');
293	0	smart_str_append_long(buf, (zend_long) index);
294	0	smart_str_appendc(buf, '"');
295	0	}
296
297	460	smart_str_appendc(buf, ':');
298	460	php_json_pretty_print_char(buf, options, ' ');
299	460	}
300
301	1.79k	if (php_json_encode_zval(buf, data, options, encoder) == FAILURE &&
302	13	!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
303	13	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
304	13	zend_release_properties(prop_ht);
305	13	zval_ptr_dtor(&tmp);
306	13	return FAILURE;
307	13	}
308	1.77k	if (UNEXPECTED(need_dtor)) {
309	284	zval_ptr_dtor(&tmp);
310	284	}
311
312	1.77k	smart_str_appendc(buf, ',');
313	1.77k	} ZEND_HASH_FOREACH_END();
314
315	307	empty = ZSTR_VAL(buf->s)[ZSTR_LEN(buf->s) - 1] != ',';
316	307	if (!empty) {
317		/* Drop the trailing comma. */
318	294	ZSTR_LEN(buf->s)--;
319	294	}
320	307	}
321
322	366	PHP_JSON_HASH_UNPROTECT_RECURSION(recursion_rc);
323
324	366	if (encoder->depth > encoder->max_depth) {
325	0	encoder->error_code = PHP_JSON_ERROR_DEPTH;
326	0	if (!(options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR)) {
327	0	zend_release_properties(prop_ht);
328	0	return FAILURE;
329	0	}
330	0	}
331	366	--encoder->depth;
332
333		/* Only keep closing bracket on same line for empty arrays/objects */
334	366	if (!empty) {
335	294	php_json_pretty_print_char(buf, options, '\n');
336	294	php_json_pretty_print_indent(buf, options, encoder);
337	294	}
338
339	366	if (!encode_as_object) {
340	116	smart_str_appendc(buf, ']');
341	250	} else {
342	250	smart_str_appendc(buf, '}');
343	250	}
344
345	366	zend_release_properties(prop_ht);
346	366	return SUCCESS;
347	366	}
348		/* }}} */
349
350		zend_result php_json_escape_string(
351		smart_str buf, const char s, size_t len,
352		int options, php_json_encoder encoder) / {{{ */
353	1.55k	{
354	1.55k	size_t pos, checkpoint;
355	1.55k	char *dst;
356
357	1.55k	if (len == 0) {
358	57	smart_str_appendl(buf, "\"\"", 2);
359	57	return SUCCESS;
360	57	}
361
362	1.49k	if (options & PHP_JSON_NUMERIC_CHECK) {
363	0	double d;
364	0	int type;
365	0	zend_long p;
366
367	0	if ((type = is_numeric_string(s, len, &p, &d, 0)) != 0) {
368	0	if (type == IS_LONG) {
369	0	smart_str_append_long(buf, p);
370	0	return SUCCESS;
371	0	} else if (type == IS_DOUBLE && php_json_is_valid_double(d)) {
372	0	php_json_encode_double(buf, d, options);
373	0	return SUCCESS;
374	0	}
375	0	}
376
377	0	}
378	1.49k	checkpoint = buf->s ? ZSTR_LEN(buf->s) : 0;
379
380		/* pre-allocate for string length plus 2 quotes */
381	1.49k	smart_str_alloc(buf, len+2, 0);
382	1.49k	smart_str_appendc(buf, '"');
383
384	1.49k	pos = 0;
385
386	68.9k	do {
387	68.9k	static const uint32_t charmap[8] = {
388	68.9k	0xffffffff, 0x500080c4, 0x10000000, 0x00000000,
389	68.9k	0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff};
390
391	68.9k	unsigned int us = (unsigned char)s[pos];
392	68.9k	if (EXPECTED(!ZEND_BIT_TEST(charmap, us))) {
393	42.0k	pos++;
394	42.0k	len--;
395	42.0k	if (len == 0) {
396	1.44k	smart_str_appendl(buf, s, pos);
397	1.44k	break;
398	1.44k	}
399	42.0k	} else {
400	26.8k	if (pos) {
401	1.95k	smart_str_appendl(buf, s, pos);
402	1.95k	s += pos;
403	1.95k	pos = 0;
404	1.95k	}
405	26.8k	us = (unsigned char)s[0];
406	26.8k	if (UNEXPECTED(us >= 0x80)) {
407	9.41k	zend_result status;
408	9.41k	us = php_next_utf8_char((unsigned char *)s, len, &pos, &status);
409
410		/* check whether UTF8 character is correct */
411	9.41k	if (UNEXPECTED(status != SUCCESS)) {
412	9.35k	if (options & PHP_JSON_INVALID_UTF8_IGNORE) {
413		/* ignore invalid UTF8 character */
414	9.30k	} else if (options & PHP_JSON_INVALID_UTF8_SUBSTITUTE) {
415		/* Use Unicode character 'REPLACEMENT CHARACTER' (U+FFFD) */
416	0	if (options & PHP_JSON_UNESCAPED_UNICODE) {
417	0	smart_str_appendl(buf, "\xef\xbf\xbd", 3);
418	0	} else {
419	0	smart_str_appendl(buf, "\\ufffd", 6);
420	0	}
421	49	} else {
422	49	ZSTR_LEN(buf->s) = checkpoint;
423	49	encoder->error_code = PHP_JSON_ERROR_UTF8;
424	49	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
425	0	smart_str_appendl(buf, "null", 4);
426	0	}
427	49	return FAILURE;
428	49	}
429
430		/* Escape U+2028/U+2029 line terminators, UNLESS both
431		JSON_UNESCAPED_UNICODE and
432		JSON_UNESCAPED_LINE_TERMINATORS were provided */
433	9.35k	} else if ((options & PHP_JSON_UNESCAPED_UNICODE)
434	64	&& ((options & PHP_JSON_UNESCAPED_LINE_TERMINATORS)
435	64	\|\| us < 0x2028 \|\| us > 0x2029)) {
436	64	smart_str_appendl(buf, s, pos);
437	64	} else {
438		/* From http://en.wikipedia.org/wiki/UTF16 */
439	0	if (us >= 0x10000) {
440	0	unsigned int next_us;
441
442	0	us -= 0x10000;
443	0	next_us = (unsigned short)((us & 0x3ff) \| 0xdc00);
444	0	us = (unsigned short)((us >> 10) \| 0xd800);
445	0	dst = smart_str_extend(buf, 6);
446	0	dst[0] = '\\';
447	0	dst[1] = 'u';
448	0	dst[2] = digits[(us >> 12) & 0xf];
449	0	dst[3] = digits[(us >> 8) & 0xf];
450	0	dst[4] = digits[(us >> 4) & 0xf];
451	0	dst[5] = digits[us & 0xf];
452	0	us = next_us;
453	0	}
454	0	dst = smart_str_extend(buf, 6);
455	0	dst[0] = '\\';
456	0	dst[1] = 'u';
457	0	dst[2] = digits[(us >> 12) & 0xf];
458	0	dst[3] = digits[(us >> 8) & 0xf];
459	0	dst[4] = digits[(us >> 4) & 0xf];
460	0	dst[5] = digits[us & 0xf];
461	0	}
462	9.36k	s += pos;
463	9.36k	len -= pos;
464	9.36k	pos = 0;
465	17.4k	} else {
466	17.4k	s++;
467	17.4k	switch (us) {
468	230	case '"':
469	230	if (options & PHP_JSON_HEX_QUOT) {
470	0	smart_str_appendl(buf, "\\u0022", 6);
471	230	} else {
472	230	smart_str_appendl(buf, "\\\"", 2);
473	230	}
474	230	break;
475
476	85	case '\\':
477	85	smart_str_appendl(buf, "\\\\", 2);
478	85	break;
479
480	155	case '/':
481	155	if (options & PHP_JSON_UNESCAPED_SLASHES) {
482	151	smart_str_appendc(buf, '/');
483	151	} else {
484	4	smart_str_appendl(buf, "\\/", 2);
485	4	}
486	155	break;
487
488	26	case '\b':
489	26	smart_str_appendl(buf, "\\b", 2);
490	26	break;
491
492	42	case '\f':
493	42	smart_str_appendl(buf, "\\f", 2);
494	42	break;
495
496	246	case '\n':
497	246	smart_str_appendl(buf, "\\n", 2);
498	246	break;
499
500	1.75k	case '\r':
501	1.75k	smart_str_appendl(buf, "\\r", 2);
502	1.75k	break;
503
504	45	case '\t':
505	45	smart_str_appendl(buf, "\\t", 2);
506	45	break;
507
508	8.27k	case '<':
509	8.27k	if (options & PHP_JSON_HEX_TAG) {
510	4.01k	smart_str_appendl(buf, "\\u003C", 6);
511	4.26k	} else {
512	4.26k	smart_str_appendc(buf, '<');
513	4.26k	}
514	8.27k	break;
515
516	76	case '>':
517	76	if (options & PHP_JSON_HEX_TAG) {
518	60	smart_str_appendl(buf, "\\u003E", 6);
519	60	} else {
520	16	smart_str_appendc(buf, '>');
521	16	}
522	76	break;
523
524	24	case '&':
525	24	if (options & PHP_JSON_HEX_AMP) {
526	20	smart_str_appendl(buf, "\\u0026", 6);
527	20	} else {
528	4	smart_str_appendc(buf, '&');
529	4	}
530	24	break;
531
532	4	case '\'':
533	4	if (options & PHP_JSON_HEX_APOS) {
534	0	smart_str_appendl(buf, "\\u0027", 6);
535	4	} else {
536	4	smart_str_appendc(buf, '\'');
537	4	}
538	4	break;
539
540	6.46k	default:
541	6.46k	ZEND_ASSERT(us < ' ');
542	6.46k	dst = smart_str_extend(buf, 6);
543	6.46k	dst[0] = '\\';
544	6.46k	dst[1] = 'u';
545	6.46k	dst[2] = '0';
546	6.46k	dst[3] = '0';
547	6.46k	dst[4] = digits[(us >> 4) & 0xf];
548	6.46k	dst[5] = digits[us & 0xf];
549	6.46k	break;
550	17.4k	}
551	17.4k	len--;
552	17.4k	}
553	26.8k	}
554	68.9k	} while (len);
555
556	1.44k	smart_str_appendc(buf, '"');
557
558	1.44k	return SUCCESS;
559	1.49k	}
560		/* }}} */
561
562		static zend_result php_json_encode_serializable_object(smart_str buf, zend_object obj, int options, php_json_encoder *encoder)
563	37	{
564	37	zend_class_entry *ce = obj->ce;
565	37	uint32_t *guard = zend_get_recursion_guard(obj);
566	37	zval retval;
567	37	zend_result return_code;
568
569	37	ZEND_ASSERT(guard != NULL);
570
571	37	if (ZEND_GUARD_IS_RECURSIVE(guard, JSON)) {
572	0	encoder->error_code = PHP_JSON_ERROR_RECURSION;
573	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
574	0	smart_str_appendl(buf, "null", 4);
575	0	}
576	0	return FAILURE;
577	0	}
578
579	37	ZEND_GUARD_PROTECT_RECURSION(guard, JSON);
580
581		/* jsonSerialize() may drop the last reference to the object, e.g. by
582		* nulling a reference that aliases the encoded array slot; keep it alive
583		* so the recursion guard and the identity check below stay valid. */
584	37	GC_ADDREF(obj);
585
586	37	zend_function *json_serialize_method = zend_hash_str_find_ptr(&ce->function_table, ZEND_STRL("jsonserialize"));
587	37	ZEND_ASSERT(json_serialize_method != NULL && "This should be guaranteed prior to calling this function");
588	37	zend_call_known_function(json_serialize_method, obj, ce, &retval, 0, NULL, NULL);
589		/* An exception has occurred */
590	37	if (Z_TYPE(retval) == IS_UNDEF) {
591	13	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
592	0	smart_str_appendl(buf, "null", 4);
593	0	}
594	13	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
595	13	OBJ_RELEASE(obj);
596	13	return FAILURE;
597	13	}
598
599	24	if (Z_TYPE(retval) == IS_OBJECT && Z_OBJ(retval) == obj) {
600		/* Handle the case where jsonSerialize does: return $this; by going straight to encode array */
601	0	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
602	0	return_code = php_json_encode_array(buf, &retval, options, encoder);
603	24	} else {
604		/* All other types, encode as normal */
605	24	return_code = php_json_encode_zval(buf, &retval, options, encoder);
606	24	ZEND_GUARD_UNPROTECT_RECURSION(guard, JSON);
607	24	}
608
609	24	zval_ptr_dtor(&retval);
610	24	OBJ_RELEASE(obj);
611
612	24	return return_code;
613	37	}
614
615		static zend_result php_json_encode_serializable_enum(smart_str buf, zval val, int options, php_json_encoder *encoder)
616	157	{
617	157	const zend_class_entry *ce = Z_OBJCE_P(val);
618	157	if (ce->enum_backing_type == IS_UNDEF) {
619	65	encoder->error_code = PHP_JSON_ERROR_NON_BACKED_ENUM;
620	65	smart_str_appendc(buf, '0');
621	65	return FAILURE;
622	65	}
623
624	92	zval *value_zv = zend_enum_fetch_case_value(Z_OBJ_P(val));
625	92	return php_json_encode_zval(buf, value_zv, options, encoder);
626	157	}
627
628		zend_result php_json_encode_zval(smart_str buf, zval val, int options, php_json_encoder encoder) / {{{ */
629	4.69k	{
630	4.72k	again:
631	4.72k	switch (Z_TYPE_P(val))
632	4.72k	{
633	297	case IS_NULL:
634	297	smart_str_appendl(buf, "null", 4);
635	297	break;
636
637	309	case IS_TRUE:
638	309	smart_str_appendl(buf, "true", 4);
639	309	break;
640	261	case IS_FALSE:
641	261	smart_str_appendl(buf, "false", 5);
642	261	break;
643
644	1.99k	case IS_LONG:
645	1.99k	smart_str_append_long(buf, Z_LVAL_P(val));
646	1.99k	break;
647
648	166	case IS_DOUBLE:
649	166	if (php_json_is_valid_double(Z_DVAL_P(val))) {
650	147	php_json_encode_double(buf, Z_DVAL_P(val), options);
651	147	} else {
652	19	encoder->error_code = PHP_JSON_ERROR_INF_OR_NAN;
653	19	smart_str_appendc(buf, '0');
654	19	}
655	166	break;
656
657	1.09k	case IS_STRING:
658	1.09k	return php_json_escape_string(buf, Z_STRVAL_P(val), Z_STRLEN_P(val), options, encoder);
659
660	457	case IS_OBJECT:
661	457	if (instanceof_function(Z_OBJCE_P(val), php_json_serializable_ce)) {
662	37	return php_json_encode_serializable_object(buf, Z_OBJ_P(val), options, encoder);
663	37	}
664	420	if (Z_OBJCE_P(val)->ce_flags & ZEND_ACC_ENUM) {
665	157	return php_json_encode_serializable_enum(buf, val, options, encoder);
666	157	}
667		/* fallthrough -- Non-serializable object */
668	263	ZEND_FALLTHROUGH;
669	386	case IS_ARRAY: {
670		/* Avoid modifications (and potential freeing) of the array through a reference when a
671		* jsonSerialize() method is invoked. */
672	386	zval zv;
673	386	zend_result res;
674	386	ZVAL_COPY(&zv, val);
675	386	res = php_json_encode_array(buf, &zv, options, encoder);
676	386	zval_ptr_dtor_nogc(&zv);
677	386	return res;
678	263	}
679
680	29	case IS_REFERENCE:
681	29	val = Z_REFVAL_P(val);
682	29	goto again;
683
684	0	default:
685	0	encoder->error_code = PHP_JSON_ERROR_UNSUPPORTED_TYPE;
686	0	if (options & PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
687	0	smart_str_appendl(buf, "null", 4);
688	0	}
689	0	return FAILURE;
690	4.72k	}
691
692	3.02k	return SUCCESS;
693	4.72k	}
694		/* }}} */