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HomeBackend DevelopmentPHP TutorialSimple explanation and solution of rewrite in php runtime and http web

本文针对函数计算的 php runtime web 相关运用开发, 提供一个简单实现url rewrite的方案,在介绍方案之前,我们先看看相关的几个概念: 伪静态页面,动态页面,rewrite.

伪静态

静态网页

比如xxx网站上放了一个abc.html文件,你想访问它就直接输入xxx. com/abc.html。Web服务器看到这样的地址就直接找到这个文件输出给客户端。

动态网页

假如你想做一个显示当前时间的页面,那么就可以写个PHP文件,然后访问xxx. com/abc.php。Web服务器看到这样的地址,找到abc.php这个文件,会交给PHP执行后返回给客户端。而动态网页往往要输入参数,所以地址就变成xxx. com/abc.php?a=1&b=2。

搜索引擎比较烦这种带问号的动态网页,因为参数可以随便加,而返回内容却不变,所以会对这种网页降权。于是有了mod_rewrite,它可以重新映射地址。

rewrite

比如当前这个页面的地址 http://www.xxx.com/post/20153311,Web服务器收到请求后会重新映射为 www.xxx.com/post.php?id=20153311,然后再执行那个PHP程序。(以上网址均为假设)这样,在内部不改变的情况下,对外呈现出来的网址变成了没有问号的象静态网页的网址一样。于是有人给起了个名字叫“伪静态”。其实也没什么伪的,就是没有问号的静态网址,让搜索引擎舒服点而已。

函数计算 php runtime 简单实现 rewrite 的一种方法

先以简单的nginx 中的一个简单的 rewrite 为例:

location ~ ^/(\w+)$ {
    rewrite /index.php?sub=$1;
}
location ~ ^/post/(\w+)/(\d+)$ {
    rewrite /post.php?class=$1&id=$2;
}

php url rewrite 简单实现

<?php
function rewrite_urls($s) 
{
    $in = array(
      &#39;|^/post/(\\w+)/(\\d+)$|&#39;,
      &#39;|^/(\\w+)$|&#39;
    );
    $out = array(
      &#39;/post.php?class=$1&id=$2&#39;,
      &#39;/index.php?sub=$1&#39;,
    
    );
    return preg_replace($in, $out, $s); 
}
$post_url = &#39;/post/literatrue/34&#39;;
echo rewrite_urls($post_url) .PHP_EOL;
$index_url = &#39;/admin&#39;;
echo rewrite_urls($index_url) .PHP_EOL;

执行输出结果:

/post.php?class=literatrue&id=34
/index.php?sub=admin

因此在使用 php runtime的时候,根据收到请求的uri(假设是/post/literatrue/34), 执行 rewrite_urls 函数(rewrite 规则填写在这个函数的 $in $out 中), 然后将 rewrite 后的 uri (/post.php?class=literatrue&id=34) 作为调用 fcPhpCgiProxy.requestPhpCgi 函数时,传入参数 $fastCgiParams 的一对 key-value

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