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header() 301重定向实现代码

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Release: 2016-06-02 09:14:15
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先来看一个实例:header('location: http://www.phprm.com/');上面是简单的调跳,我们要做永久转向怎么做呢,如下.

语法:header(string,replace,http_response_code)

参数 描述

string 必需,规定要发送的报头字符串.

replace 可选,指示该报头是否替换之前的报头,或添加第二个报头.

默认是 true(替换),false(允许相同类型的多个报头).

http_response_code 可选,把 http 响应代码强制为指定的值,php 4 以及更高版本可用,其它中 http_response_code 就是我们要写的301代码了,如下:

$url = "http://www.phprm.com"; 
header("http/1.1 301 moved permanently"); 
header("location: $url"); 
exit();
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注释:从 php 4.4 之后,该函数防止一次发送多个报头,这是对头部注入攻击的保护措施.

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