<?php
if(isset($_GET['userName'])){
    $userName = $_GET['userName'];
}
else{
    $userName = "";
    echo "请输入用户名<br/>"; 
}
if(isset($_GET['password'])){
    $password = $_GET['password'];
}
else{
    $password = "";
    echo "请输入密码<br/>";
}
if($userName=="admin"&&$password=="admin"){
    echo "您输入的用户名与密码匹配!";
}
else{
    if($userName!="admin"){
        echo "用户名填写错误！<br/>";
    }
    if($password!="admin"){
        echo "密码填写错误!<br/>";
    }
}
?>