What should I do if PHP does not jump to the page when submitting a post?

With the development of the Internet, more and more websites need to submit user data through forms. Among them, PHP, as a widely used server-side programming language, is very suitable for processing form data. In PHP, form data can be passed through the POST method. Normally, POST will jump to other pages after submission, but sometimes we hope that after submitting the form data, the page will not jump and the submission results will be displayed on the same page. This article will introduce how to implement PHP submission of POST requests without jumping to the page.

1. Use AJAX technology

AJAX is the abbreviation of Asynchronous JavaScript and XML (asynchronous JavaScript and XML). It is a method of obtaining data from the server through JavaScript background without refreshing the entire page. Data technology. Therefore, form data can be submitted without refreshing the page using AJAX technology.

First, you need to introduce the jQuery library into the HTML code. jQuery is a lightweight JavaScript library that greatly simplifies JavaScript programming.

<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>

Add an ID attribute to the form tag to manipulate the form in jQuery.

<form id="myForm" action="submit.php" method="post">
  <!-- 表单元素 -->
</form>

Use jQuery’s $.post() method in JavaScript to submit form data. The sample code is as follows:

$(function(){
  $('#myForm').submit(function(event){
    event.preventDefault(); // 阻止表单默认提交
    $.post('submit.php', $(this).serialize(), function(response){
      // 处理服务器返回的响应数据
    });
  });
});

$.post() method receives three parameters: the URL to be submitted, the data to be submitted, and the callback function when successful. Among them, the $(this).serialize() method can serialize the form data into a string for easy transmission.

In PHP files (such as submit.php), use the $_POST super global array to receive form data, and return it to the client after processing. The sample code is as follows:

<?php
// 处理表单数据
$response = array("status" => 1, "message" => "提交成功");
echo json_encode($response); // 将响应数据转换为 JSON 格式返回给客户端
?>

2. Implementation using iframe

The method of using iframe is relatively simple. You can create a hidden iframe when submitting the form and submit the form data to the iframe. Since the form data is submitted within an iframe, the URL of the current page is not changed. Finally, the response data in the iframe can be obtained through JS and displayed in the current page.

The HTML code is as follows:

<form id="myForm" target="iframe" action="submit.php" method="post">
  <!-- 表单元素 -->
  <input type="submit" value="提交">
</form>
<iframe name="iframe" style="display:none;"></iframe>

Among them, the target attribute of the form specifies the window or frame to be submitted to. Since we want to achieve a non-jumping page, we specify the target as a hidden iframe.

Process the form data in submit.php and return the response data to the iframe:

<?php
// 处理表单数据
$response = array("status" => 1, "message" => "提交成功");
echo "<script>parent.postMessage('" . json_encode($response) . "', '*');</script>"; // 将响应数据传递给父页面
?>

Listen to the load event of the iframe through JS in the parent page and obtain the response data in the iframe:

$(function(){
  $('#iframe').on('load', function(){
    var response = $(this).contents().find('body').html();
    // 处理服务器返回的响应数据
  });
});

Summary

This article introduces two ways to implement PHP submission of POST requests without jumping to the page, which are to use AJAX technology and to use iframe. Both methods have their own advantages and disadvantages, and can be chosen according to specific needs.

Using AJAX technology can avoid page refresh to the greatest extent, and the operation process will be smoother. However, some basic knowledge of JavaScript and familiarity with the jQuery library is required.

Using iframe technology is easier to implement, but it requires creating one more iframe and processing the response data in the iframe.

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