代码放在本地做测试，一个简单的登录，但是curl post不过去数据，也取不回这个success

然后curl代码如下：

<?php  header("content-Type: text/html; charset=UTF-8"); $login_url="http://127.0.0.3/35/doLogin.php"; $data = array("username" => "demo", "password" => "demo","is_ajax"=>"1");                                                                     $data_string = json_encode($data); //提交登录表单请求 $ch=curl_init($login_url); curl_setopt($ch,CURLOPT_HEADER,0); curl_setopt($ch,CURLOPT_RETURNTRANSFER,0); curl_setopt($ch,CURLOPT_POST,1); curl_setopt($ch,CURLOPT_POSTFIELDS,$data_string); curl_setopt($ch, CURLOPT_HTTPHEADER, array("X-Requested-With: XMLHttpRequest"));   $data=curl_exec($ch); curl_close($ch);  var_dump(json_decode($data,true));   ?>

访问curl代码打印出来是NULL