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HomeBackend DevelopmentPHP Tutorial浅析Apache中RewriteCond规则参数的详细介绍_php技巧

RewriteCond就像我们程序中的if语句一样,表示如果符合某个或某几个条件则执行RewriteCond下面紧邻的RewriteRule语句,这就是RewriteCond最原始、基础的功能,为了方便理解,下面来看看几个例子。

复制代码 代码如下:

RewriteEngine on
RewriteCond  %{HTTP_USER_AGENT}  ^Mozilla//5/.0.*
RewriteRule  index.php            index.m.php
RewriteCond  %{HTTP_USER_AGENT}  ^Lynx.*
RewriteRule  index.php            index.L.php
RewriteRule  index.php            index.b.php

上面语句的作用是当你是用FF浏览器访问index.php这个文件的时候,会自动让你访问到index.m.php这个文件,当你是用一些移动终端访问的 时候,会让你对index.php这个文件的访问实际访问的是index.L.php去,如果你是用其它的浏览器访问的时候,会让你跳到 index.b.php。在说形象一点,上面的语句就等同于程序里面的下面语句(依PHP语句为例):
复制代码 代码如下:

if($_SERVER['HTTP_USER_AGENT'] == 'Mozilla/5.0')
{
//跳转到对index.m.php的访问
}
else if($_SERVER['HTTP_USER_AGENT'] == 'Lynx')
{
//跳转到对index.L.php的访问
}
else
//跳转到对index.b.php的访问

在看例2:
RewriteCond %{HTTP_REFERER} (www.test.cn)
RewriteRule (.*)$ test.php
上面语句的作用是如果你访问的上一个页面的主机地址是www.test.cn,则无论你当前访问的是哪个页面,都会跳转到对test.php的访问。
在看例三:
复制代码 代码如下:

RewriteCond %{REMOTE_HOST} ^host1.* [OR]
RewriteCond %{REMOTE_HOST} ^host2.* [OR]
RewriteCond %{REMOTE_HOST} ^host3.*
RewriteRule (.*)$ test.php

上面语句的作用是如果你的地址是host1或host2或host3的时候,则就跳到对test.php。从这里可以看出,RewriteCond语句之间默认的是AND,如果想要OR,则要明确的写出来。
下面是自己收藏的一些有用的重写规则:
RewriteCond %{REQUEST_FILENAME} !-f   //如果文件存在,就直接访问文件,不进行下面的RewriteRule.(不是文件或文件不存在就执行重写)
RewriteCond %{REQUEST_FILENAME} !-d   //#如果目录存在就直接访问目录不进行RewriteRule
RewriteCond %{REQUEST_URI} !^.*(/.css|/.js|/.gif|/.png|/.jpg|/.jpeg)$ //#如果是这些后缀的文件,就直接访问文件,不进行Rewrite
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