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<?php if (!function_exists('json_encode')) { function json_encode($it) { $tmp = $it; if (!($assoc = is_object($it)) && !is_array($it)) { return _js_enc_value((array)$it); } $i = 0; $it = (array)$it; if (!$assoc) { foreach ($it as $k => $v) { if ($k !== $i) { $assoc = true; break; } $i++; } } $data = array(); foreach ($it as $k => $v) { $v = _js_enc_value($v); if ($assoc) { $k = _js_enc_value($k); $data[] = $k . ':' . $v; } else { $data[] = $v; } } if ($assoc) { $bl = '{'; $br = '}'; } else { $bl = '['; $br = ']'; } return $bl . implode(',', $data) . $br; } function _js_enc_value($value) { switch (true) { case is_array($value): case is_object($value): return json_encode($value); case $value === null: case is_resource($value): return 'null'; case is_bool($value): return $value ? 'true' : 'false'; case is_string($value): return '"' . _js_uc_esc($value) . '"'; default: return $value; } } function _js_uc_esc($value) { $pattern = "@[\x08-\x10\x0c\x0d\\\\\"/]|([^\x08-\x10\x0c\x0d\x32-\x7f\\\\\"/])++@"; return preg_replace_callback($pattern, '_js_uc_esc_cb', $value); } function _js_uc_esc_cb($matches) { switch (true) { case isset($matches[1]): $char = mb_convert_encoding($matches[0], 'UTF-16', 'UTF-8'); $str = ''; $len = strlen($char); for ($i = 0; $i < $len; $i += 2) { $str .= sprintf('\\u%02x%02x', ord($char[$i]), ord($char[$i + 1]) ); } return $str; default: return addcslashes($matches[0], "\x08\x09\x10\x0c\x0d\\\"/"); } } } $var = array( array( 'text', 1, 1.1, true, false, null, array(), new stdClass, fopen('php://stdin', 'r'), ), array( '0' => 'hoge', '1' => 'foo', ), (object)array( '0' => 'hoge', '1' => 'foo', ), array( '0' => 'hoge', '2' => 'foo', ), (object)array( '0' => 'hoge', '2' => 'foo', ), ); var_dump(@json_encode($var));
Output for 5.5.0 - 5.6.28, 7.0.0 - 7.1.0
bool(false)
Output for hhvm-3.10.0 - 3.12.0
string(125) "[["text",1,1.1,true,false,null,[],{},[]],["hoge","foo"],{"0":"hoge","1":"foo"},{"0":"hoge","2":"foo"},{"0":"hoge","2":"foo"}]"
Output for 5.2.0 - 5.4.45
string(127) "[["text",1,1.1,true,false,null,[],{},null],["hoge","foo"],{"0":"hoge","1":"foo"},{"0":"hoge","2":"foo"},{"0":"hoge","2":"foo"}]"
Output for 4.3.0 - 5.1.6
string(115) "[["text",1,1.1,true,false,null,[],{},null],["hoge","foo"],{0:"hoge",1:"foo"},{0:"hoge",2:"foo"},{0:"hoge",2:"foo"}]"