php相對路徑轉化成絕對路徑

提取 Gregarius中的一個函數。可以把網頁中的相對路徑自動轉化成絕對路徑。

<?
function relative_to_absolute($content, $feed_url) {
    PReg_match('/(http|https|ftp):\/\//', $feed_url, $protocol);
    $server_url = preg_replace("/(http|https|ftp|news):\/\//", "", $feed_url);
    $server_url = preg_replace("/\/.*/", "", $server_url);
    if ($server_url == '') {
        return $content;
    }
    if (isset($protocol[0])) {
        $new_content = preg_replace('/href="\//', 'href="'.$protocol[0].$server_url.'/', $content);
        $new_content = preg_replace('/src="\//', 'src="'.$protocol[0].$server_url.'/', $new_content);
    } else {
        $new_content = $content;
    }
    return $new_content;
}
?>