How to use PHP to implement page return function

Title: Methods and code examples for implementing the page return function in PHP

In web development, we often encounter situations where the page return function needs to be implemented, that is, the user You can return to the previous page when you click the back button. In PHP, this function can be achieved by using the header function in combination with JavaScript. This article will introduce how to use PHP to implement the page return function and provide specific code examples.

1. Use the header function to implement the page return function

The header function is a function in PHP used to send the original HTTP header. We can use it to implement page jumps. The specific steps are as follows:

1. First, add the following code to the PHP page that needs to implement the page return function:

<?php
// 获取上一个页面的URL
$referer = $_SERVER['HTTP_REFERER'];

// 判断referer是否为空，若为空则跳转至首页，否则返回上一个页面
if(empty($referer)){
    header('Location: index.php'); 
} else {
    header('Location: ' . $referer);
}
?>

2. Then, click the return button when you need to Where, add the following HTML code:

<input type="button" value="返回" onclick="goBack()">

3. Finally, add the following JavaScript code to the HTML file:

<script>
function goBack() {
    window.history.back();
}
</script>

2. Sample code and demonstration

Next, we demonstrate this feature through a simple example. Suppose we have two pages, one is index.php and the other is page1.php. Add the above PHP code to the page1.php page, and then add the HTML code for the return button wherever you need to return on the page.

Effect demonstration:

Suppose the user clicks the link from the index.php page to jump to the page1.php page. If the user clicks the return button in the page1.php page, it will automatically return to the index. php page.

Through the above steps, we successfully implemented the page return function in PHP using the header function combined with JavaScript. This method is simple and easy to implement, and has a positive effect on improving user experience and page navigation.

Summary:

This article introduces how to use PHP to implement the page return function and provides specific code examples. By combining header functions and JavaScript, we can implement a simple and effective page return function in PHP pages, providing users with a more friendly page interaction experience. Hope this article helps you!

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