//获取字符串中的域名
function getStringUrl($Text)
{
    $parttern = "/http[s]?:\/\/(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+/";
    preg_match($parttern, $Text, $match);
    return count($match) > 0 ? $match[0] : '';
}