PHP连接MySQL应用

一 代码

<?php
$host = "127.0.0.1";     //
$userName = "root";     //
$password = "root";     //
if ($connID = mysql_connect($host, $userName, $password)){
     //
    echo "<script language='javascript'>alert('连接上');</script>";
}else{
    echo "<script language='javascript'>alert('没连上');</script>";
}
?>