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PHP: mod_rewrite if query contains value
/
/index.php
/content/
/content/styles.css
/domain/
/domain/index.php

<link rel="stylesheet" type="text/css" href="content/styles.css" />

RewriteRule ^([^/]+)$ /content/$1 [NC,L]

<VirtualHost *:80>
    DocumentRoot "/domain"
    Alias /content "/content"
</VirtualHost>

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f

$dir = dirname(__FILE__);
$link = $_SERVER['HTTP_HOST'];
// $link = preg_replace('/^www./i', '', $link);

href="<?php echo $link . '/content/content.css'; ?>"

include($dir . '/example.php');