How to use header() function to refresh the page in PHP?
In PHP we can use the header() function to refresh the page; this function will send the HTTP header to the client or browser in its original form. The following article will introduce to you how to use the header() function to refresh the page. I hope it will be helpful to you.
PHP header() function
PHP header() function converts the HTTP header in its original form Sent to client or browser. Raw data is sent as header information with requests made by the server (especially HTTP requests) before sending HTML, XML, JSON or other output to the browser or client. HTTP headers more accurately provide the information needed about the objects sent in the message bodies of requests and responses.
Basic syntax
header( $header, $replace = TRUE, $http_response_code )
or
header(string, replace, http_response_code)
Parameters:
● $header: It contains the header string. There are two types of header calls. The first case of the header starts with the string "http/" and is used to determine the HTTP status code to be sent. The second case of headers starts with "Location:". This is a mandatory parameter.
●$replace: This is an optional parameter and can be omitted. It is used to indicate that a header should replace the previous one or add a second header; the default value is True (will replace). If the $replace value is False, multiple headers of the same type are forced to be used.
●$http_response_code: This is an optional parameter and can be omitted. It forces the HTTP response code to a specified value (php 4.3 and above).
Note: This header() function prevents multiple headers from being sent at the same time. Following the release of PHP 4.4, this is protection against header injection attacks.
Code example
The following is an example of how to use the header() function to refresh the page in PHP:
Example 1: Use the header() function to refresh the web page every 3 seconds.
<?php header("content-type:text/html;charset=utf-8"); echo "页面每3秒刷新一次</br></br>"; // 该函数每3秒钟刷新一次页面 header("refresh: 3"); echo date('H:i:s Y-m-d'); exit; ?>
Output:
Example 2: Use the header() function to redirect the web page to another page after 3 seconds Jump to another page
<?php header("content-type:text/html;charset=utf-8"); echo "我们将在3秒钟内重定向到PHP中文网!</br></br>"; // 该函数每3秒钟刷新一次页面 header("refresh: 3; url = http://www.php.cn/"); exit; ?>
Output:
Related video tutorial recommendation: "PHP Tutorial"
The above is the entire content of this article, I hope it will be helpful to everyone's study. For more exciting content, you can pay attention to the relevant tutorial columns of the PHP Chinese website! ! !
The above is the detailed content of How to use header() function to refresh the page in PHP?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
