php 拼接get参数

//拼接url
public function createLinkstringUrlencode($para)
{
    $arg = "";
    while (list ($key, $val) = each($para)) {
        $arg .= $key . "=" . urlencode($val) . "&";
    }
    $arg = substr($arg, 0, count($arg) - 2);
    if (get_magic_quotes_gpc()) {
        $arg = stripslashes($arg);
    }
    return $arg;
}