Home php教程 php手册 header函式的使用

header函式的使用

Jun 13, 2016 am 10:27 AM
header html http by use yes server Header Browser of

标头 (header) 是服务器以 HTTP 协义传 HTML 资料到浏览器前所送出的字串,在标头
与 HTML 文件之间尚需空一行分隔。有关 HTTP 的详细说明,可以参 RFC 2068 官方文件
(http://www.w3.org/Protocols/rfc2068/rfc2068)。在 PHP 中送回 HTML 资料前,需先
传完所有的标头。
注意: 传统的标头一定包含下面三种标头之一,并只能出现一次。
Content-Type: xxxx/yyyy
Location: xxxx:yyyy/zzzz
Status: nnn xxxxxx
在新的多型标头规格 (Multipart MIME) 方可以出现二次以上。
使用范例
范例一: 本例使浏览器重定向到 PHP 的官方网站。
Header("Location: http://www.php.net");
exit;
>?
范例二: 要使用者每次都能得到最新的资料,而不是 Proxy 或 cache 中的资料,可以使用下列的标头
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . "GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
>?
范例三: 让使用者的浏览器出现找不到档案的信息。
header("Status: 404 Not Found");
>?
范例四:让使用者下载档案。
header("Content-type: application/x-gzip");


header("Content-Disposition: attachment; filename=文件名");
header("Content-Description: PHP3 Generated Data");
>?
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

HTML and React: The Relationship Between Markup and Components HTML and React: The Relationship Between Markup and Components Apr 12, 2025 am 12:03 AM

The relationship between HTML and React is the core of front-end development, and they jointly build the user interface of modern web applications. 1) HTML defines the content structure and semantics, and React builds a dynamic interface through componentization. 2) React components use JSX syntax to embed HTML to achieve intelligent rendering. 3) Component life cycle manages HTML rendering and updates dynamically according to state and attributes. 4) Use components to optimize HTML structure and improve maintainability. 5) Performance optimization includes avoiding unnecessary rendering, using key attributes, and keeping the component single responsibility.

HTML: Is It a Programming Language or Something Else? HTML: Is It a Programming Language or Something Else? Apr 15, 2025 am 12:13 AM

HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

What is apache server? What is apache server for? What is apache server? What is apache server for? Apr 13, 2025 am 11:57 AM

Apache server is a powerful web server software that acts as a bridge between browsers and website servers. 1. It handles HTTP requests and returns web page content based on requests; 2. Modular design allows extended functions, such as support for SSL encryption and dynamic web pages; 3. Configuration files (such as virtual host configurations) need to be carefully set to avoid security vulnerabilities, and optimize performance parameters, such as thread count and timeout time, in order to build high-performance and secure web applications.

HTML: Building the Structure of Web Pages HTML: Building the Structure of Web Pages Apr 14, 2025 am 12:14 AM

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

The Future of HTML: Evolution and Trends in Web Design The Future of HTML: Evolution and Trends in Web Design Apr 17, 2025 am 12:12 AM

The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

From Text to Websites: The Power of HTML From Text to Websites: The Power of HTML Apr 13, 2025 am 12:07 AM

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

Tips for using HDFS file system on CentOS Tips for using HDFS file system on CentOS Apr 14, 2025 pm 07:30 PM

The Installation, Configuration and Optimization Guide for HDFS File System under CentOS System This article will guide you how to install, configure and optimize Hadoop Distributed File System (HDFS) on CentOS System. HDFS installation and configuration Java environment installation: First, make sure that the appropriate Java environment is installed. Edit /etc/profile file, add the following, and replace /usr/lib/java-1.8.0/jdk1.8.0_144 with your actual Java installation path: exportJAVA_HOME=/usr/lib/java-1.8.0/jdk1.8.0_144exportPATH=$J

HTML: The Structure, CSS: The Style, JavaScript: The Behavior HTML: The Structure, CSS: The Style, JavaScript: The Behavior Apr 18, 2025 am 12:09 AM

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

See all articles