function jsonEncode($var) {    if (function_exists(‘json_encode‘)) {        return json_encode($var);    } else {        switch (gettype($var)) {            case ‘boolean‘:                return $var ? ‘true‘ : ‘false‘; // Lowercase necessary!            case ‘integer‘:            case ‘double‘:                return $var;            case ‘resource‘:            case ‘string‘:                return ‘"‘. str_replace(array("\r", "\n", "<", ">", "&"),                    array(‘\r‘, ‘\n‘, ‘\x3c‘, ‘\x3e‘, ‘\x26‘),                    addslashes($var)) .‘"‘;            case ‘array‘:                // Arrays in JSON can‘t be associative. If the array is empty or if it                // has sequential whole number keys starting with 0, it‘s not associative                // so we can go ahead and convert it as an array.                if (empty ($var) || array_keys($var) === range(0, sizeof($var) - 1)) {                    $output = array();                    foreach ($var as $v) {                        $output[] = jsonEncode($v);                    }                    return ‘[ ‘. implode(‘, ‘, $output) .‘ ]‘;                }                // Otherwise, fall through to convert the array as an object.            case ‘object‘:                $output = array();                foreach ($var as $k => $v) {                    $output[] = jsonEncode(strval($k)) .‘: ‘. jsonEncode($v);                }                return ‘{ ‘. implode(‘, ‘, $output) .‘ }‘;            default:                return ‘null‘;        }    }}echo jsonEncode(array(‘first‘=>‘testing‘,‘second‘=>‘tangjili‘));

<?phpfunction php_json_encode( $data ) {    if( is_array($data) || is_object($data) ) {        $islist = is_array($data) && ( empty($data) || array_keys($data) === range(0,count($data)-1) );        if( $islist ) $json = ‘[‘ . implode(‘,‘, array_map(‘php_json_encode‘, $data) ) . ‘]‘;        else {            $items = Array();            foreach( $data as $key => $value ) $items[] = php_json_encode("$key") . ‘:‘ . php_json_encode($value);            $json = ‘{‘ . implode(‘,‘, $items) . ‘}‘;        }    } elseif( is_string($data) ) {        $string = ‘"‘ . addcslashes($data, "\\\"\n\r\t/" . chr(8) . chr(12)) . ‘"‘;        $json    = ‘‘;        $len    = strlen($string);        for( $i = 0; $i < $len; $i++ ) {            $char = $string[$i];            $c1 = ord($char);            if( $c1 <128 ) { $json .= ($c1 > 31) ? $char : sprintf("\\u%04x", $c1); continue; }            $c2 = ord($string[++$i]);            if ( ($c1 & 32) === 0 ) { $json .= sprintf("\\u%04x", ($c1 - 192) * 64 + $c2 - 128); continue; }            $c3 = ord($string[++$i]);            if( ($c1 & 16) === 0 ) { $json .= sprintf("\\u%04x", (($c1 - 224) <<12) + (($c2 - 128) << 6) + ($c3 - 128)); continue; }            $c4 = ord($string[++$i]);            if( ($c1 & 8 ) === 0 ) {                $u = (($c1 & 15) << 2) + (($c2>>4) & 3) - 1;                $w1 = (54<<10) + ($u<<6) + (($c2 & 15) << 2) + (($c3>>4) & 3);                $w2 = (55<<10) + (($c3 & 15)<<6) + ($c4-128);                $json .= sprintf("\\u%04x\\u%04x", $w1, $w2);            }        }    }     else $json = strtolower(var_export( $data, true ));        return $json;}echo php_json_encode(array(‘first‘=>‘testing‘));

function arrayRecursive(&$array, $function, $apply_to_keys_also = false){    foreach ($array as $key => $value) {        if (is_array($value)) arrayRecursive($array[$key], $function, $apply_to_keys_also);        else $array[$key] = $function($value);        if ($apply_to_keys_also && is_string($key)) { $new_key = $function($key); if ($new_key != $key) { $array[$new_key] = $array[$key]; unset($array[$key]); } }    }}

function JSON($array) {    arrayRecursive($array, ‘urlencode‘, true);    $json = jsonEncode($array); // 或者 $json = php_json_encode($array);    return urldecode($json);}echo JSON(array(‘first‘=>‘testing‘,‘second‘=>‘中文‘));