PHP returns a JSON array

1. Back end

//dealing with problems with JSON arrays in ChinesefunctionArrayrecursive (&$array,$function,$apply _to_keys_also=false){    Static $recursive _counter= 0; if(++$recursive _counter> 1000) {         die(' Possible deep recursion attack '); }    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]); }        }    }    $recursive _counter--;}

// returns a JSON array directly function JSON ($array) {    arrayrecursive ($arraytrue);     $json = Json_encode ($array);     return UrlDecode ($json);}

// called $data Array (); $data [' Success ']= "false"; $data [' Message ']= ' username does not exist, please re-enter'        ; Echo JSON ($data);

2. Front End

$.post ("Ajax.php?mod=member&code=check_user_exist", {username:username},function(data) {             var json=$.parsejson (data);             if (json.success) {                alert (json.success);                          }else{                alert (json.success);                     }        });

PHP returns a JSON array