How to implement cross-domain form submission in PHP

This article mainly introduces the method of php to implement cross-domain form submission, and analyzes the operation skills of curl and ajax for cross-domain submission in the form of examples. Friends in need can refer to it

The example in this article describes how to implement cross-domain form submission in PHP. Share it with everyone for your reference, the details are as follows:

Sometimes for website security reasons, we do not allow direct cross-domain submission of form data. What if we have this need ourselves? Below we will introduce two cross-domain methods to solve direct cross-domain problems.

Let’s take a look at two methods of php cross-domain form submission

1. Through php curl

function curlPost($url,$params)
{
   $postData = '';
   foreach($params as $k => $v)
   {
     $postData .= $k . '='.$v.'&';
   }
   rtrim($postData, '&');
   $ch = curl_init();
   curl_setopt($ch,CURLOPT_URL,$url);
   curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
   curl_setopt($ch,CURLOPT_HEADER, false);
   curl_setopt($ch, CURLOPT_POST, count($postData));
   curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
   $output=curl_exec($ch);
   curl_close($ch);
   return $output;
}
echo curlPost("http://test.com",array('name'=>"tank"));

In the past, many people used curl to capture email addresses, but this is no longer possible. Ha ha.

2. Use jquery form, ajax submission

1. Download jquery.form.js

2. js code

$('#testform').submit(function() {
   $(this).ajaxSubmit({
   type: 'post', // 提交方式 get/post
   dataType:"json",//数据类型
   url: 'your url', // 需要提交的 url
   success: function(data) { // data 保存提交后返回的数据，一般为 json 数据
   // 此处可对 data 作相关处理
   alert('提交成功！');
   }
   $(this).resetForm(); // 提交后重置表单
   });
   return false; // 阻止表单自动提交事件
});

3. php code

header("Access-Control-Allow-Origin:*"); //跨域权限设置，允许所有
header("Access-Control-Allow-Origin:http://www.test.com"); //只允许test.com跨域提交数据

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