How to write code to set jump page in php

With the development of the Internet, website construction has attracted more and more attention. How does PHP complete website jumps? In this article, I will introduce you to the page code for setting up jumps in PHP.

1. Jump method

In PHP, we can set the jump page by using the header function. This function is executed on the server side and will change the HTTP response header information to achieve the effect of page jump. The sample code looks like this:

header("Location: http://www.example.com/");

This code will redirect the user to the http://www.example.com/ URL. Note that this function should be placed before all output content, and do not output content after executing the header function, otherwise the function will not take effect.

2. The benefits of implementing jumps in PHP

1. High efficiency

The PHP code runs on the server side and will process the page content. output to the user. Because the page jump is performed directly on the server, it is faster and may be more efficient.

2. Easy to learn

Using the header function to jump to pages is very easy to use and does not require a high level of programming.

3. Better user experience

When users visit a website, time is precious. If your website loads slowly or lags in web page jumps, it will make users feel irritated and impatient. Using PHP to set up jumps can avoid these problems and give users a better experience.

3. Application example

1. Directly use the header function to jump

This is the most basic usage example, which only requires a simple PHP file, the code is as follows:

<?php header("Location: http://www.example.com/");
exit();
?>

In this script, we use the header function to set the jump to http://www.example.com/, and use the exit() function to stop code execution. Because after the page jumps, there is usually no need to run other code on the page.

2. Dynamic jump based on parameters

Sometimes, in the actual development process, it is necessary to jump to the page based on different parameters. For example, if you are developing a website login system, you need to jump to the user's personal center page after successful login. The code can be as follows:

<?php if(isset($_POST[&#39;submit&#39;])) { //判断是否提交表单
    $username = $_POST[&#39;username&#39;];
    $password = $_POST[&#39;password&#39;];
    if ($username === &#39;admin&#39; && $password === &#39;123456&#39;) { //模拟验证用户名和密码是否正确
        header("Location: http://example.com/user_center.php?username=$username");    //跳转到用户中心页面并将用户名带上
        exit();
    }
}
?>

In this file, we use the isset function to determine whether the form data has been submitted. If it has been submitted, the values ​​​​of the username and password will be obtained for verification. If the verification is successful, the user will be redirected to the http://example.com/user_center.php page and the user name will be passed to the page as a parameter.

4. Notes

1. Do not output any content

When using the header function to jump to the page, be sure not to output any content before the function is executed. Otherwise, the HTTP response header content has been sent, and the function jump can no longer be executed.

2. The script should be exited after the jump

After the page jump, the exit or die function should be used to exit the script. If you do not exit the script, the code in the script may continue to execute, causing some unnecessary problems.

3. The address must be complete

When setting the jump address, the complete URL must be used, including http or https protocol. Otherwise, the browser may not recognize the jump address.

In short, using the header function to jump to pages in PHP is very easy to use, highly efficient, and easy to use. If you are developing a website, you might as well try setting up jumps in PHP.

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