$str = '{"id":5730528714937479169,"fullname":"rourou","email":null,"mobile":"1391730****","description":null}';
$str = preg_replace('/"id":(\d{1,}),/', '"id":"\\1",' , $str);
echo $str;
$jsondata=json_decode($str,true);
echo "<pre>";
var_dump($jsondata);
转载于:https://my.oschina.net/mianmian/blog/661855