php preg-replace url。

Question

我在 d:/www/web12/index.php 中有一个 index.php
里面有一些 anchor 标签，例如

<a href="/docs/corn">
<a href="/docs/mais"> 

我想要 preg_replace 它们到

<a href="http://localhost/web12/directory/list=corn">
<a href="http://localhost/web12/directory/list=mais">

$url = preg_replace("/docs/", "'.$HTTP_SERVER_VARS['HTTP_HOST'].'/directory/list=", $url);// Can not use `$HTTP_SERVER_VARS['HTTP_HOST']` in `preg_replace`

Answer 1

Preg 使用/'s 作为标识符

$url = preg_replace("/\/docs\//", $HTTP_SERVER_VARS['HTTP_HOST'].'/directory/list=', $url);