1．PHP 教程_1．PHP 简介，1.php_1.php
1．PHP 教程_1．PHP 简介，1.php_1.php
PHP是服务器端脚本语言.
在学习之前,您需要对以下知识有基本的了解:
- HTML
- css
PHP是什么？
- PHP代表PHP:Hypertext Preprocessor
- PHP是一种使用广泛的开源的脚本语言
- PHP是脚本在服务器上执行
- PHP可免费下载使用
PHP文件是什么？
- PHP文件可包含文本、HTML、JavaScript代码和PHP代码
- PHP代码在服务器上执行，结果以纯HTML形式返回给浏览器
- PHP文件的默认文件扩展名“.PHP”
PHP能做什么?
- PHP可以生成动态页面内容
- PHP可以创建、打开、读取、写入、关闭服务器上的文件
- PHP可以收集表单数据
- PHP可以发送和接受cookies
- PHP可以添加、删除、修改您的数据库中的数据
- PHP可以限制用户访问您的网站上的一些页面
- PHP可以加密数据
通过PHP，您不再限于输出HTML。您可以输出图像、PDF文件，甚至Flash电影.您还可以输出任意的文本,比如XHTML和XML.
为什么使用PHP
- PHP可在不同的平台上运行（Windows、Linux、Unix、Mac OS X等）
- PHP与目前几乎所有的正在被使用的服务器相兼容(Apache、IIS等)
- PHP提供了广泛的数据库支持
- PHP是免费的，可从官方的PHP资源下载它：www.php.net
- PHP易于学习,并可高效地运行在服务器端
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