Online PHP editor | refs for Rp5gG

<?php function proxifyCSS($css, $baseURL) { return preg_replace_callback( '/url$(.*?)$/i', function($matches) use ($baseURL) { $url = $matches[1]; //Remove any surrounding single or double quotes from the URL so it can be passed to rel2abs - the quotes are optional in CSS //Assume that if there is a leading quote then there should be a trailing quote, so just use trim() to remove them if (strpos($url, "'") === 0) { $url = trim($url, "'"); } if (strpos($url, "\"") === 0) { $url = trim($url, "\""); } if (stripos($url, "data:") === 0) return "url(" . $url . ")"; //The URL isn't an HTTP URL but is actual binary data. Don't proxify it. return "url(" . PROXY_PREFIX . rel2abs($url, $baseURL) . ")"; }, $css); }