php 正则匹配指定url的参数

function get_url_params($url, $arg_name) {

        $regx = ‘/.*[&|\?]‘. $arg_name .‘=([^&]*)(.*)/‘;
        preg_match($regx, $url, $match);

        return $match[1];
    }

    $str = $_SERVER[‘HTTP_HOST‘].$_SERVER[‘PHP_SELF‘].‘?‘.$_SERVER[‘QUERY_STRING‘];
    var_dump($str);

    //preg_match(‘/.*[&|\?]a=([^&]*)(.*)/‘, $str, $match);

    //var_dump($match);

    echo get_url_params($str, ‘e‘);

    $temp_str = ‘http://xsimon.cn/mm/cc/mm.php?aa=11‘;

    $token = strtok($temp_str, ‘?‘);

    $pos = strrpos($token, ‘/‘);

    $token = substr($token, 0, $pos+1);
    var_dump($token);