Day17 翻玩login.php

第 11 屆 iThome 鐵人賽

DAY 17

自我挑戰組

30天翻玩動態網站-會員需驗證才能看到部落格文章系列第 17 篇

11th鐵人賽 php mysql 資料管理

sean666

2019-10-03 03:24:38

3594 瀏覽

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今天要來看登入頁面，這個最常見的動態網站應用，聊聊其中的設計邏輯與程式碼。

如果你是第一次看本系列的邦友，可以先點擊下方 Day01 文章，內含 30 秒的 Demo 短片跟原始碼下載。

玩轉 login.php

快速瀏覽程式，重點還是多看一眼 <script> 中的 ajax 部分，重點說明跟之前不一樣的部分

<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="">
    <meta name="author" content="">

    <title>The Perfect Cup - Register</title>

    <!-- Bootstrap Core CSS -->
    <link href="css/bootstrap.min.css" rel="stylesheet">

    <!-- Custom CSS -->
    <link href="css/business-casual.css" rel="stylesheet">

    <!-- Fonts -->
    <link href="http://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
    <link href="http://fonts.googleapis.com/css?family=Josefin+Slab:100,300,400,600,700,100italic,300italic,400italic,600italic,700italic" rel="stylesheet" type="text/css">

    <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
        <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
        <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
    <![endif]-->
	
	<!-- jQuery -->
    <script src="js/jquery.js"></script>
	
	<!-- Script -->
	<script type="text/javascript">
        		$(document).ready(function(){
			
			   $("#login").click(function(){
				
					email=$("#email").val();
					password=$("#password").val();
					 $.ajax({
						type: "POST",
						url: "pcheck.php",
						data: "email="+email+"&password="+password,
						success: function(html){
						  if(html=='true')
						  {
							  
							  $("#add_err2").html('<div class="alert alert-success"> \
													<strong>Authenticated</strong> \ \
												</div>');

							window.location.href = "blog.php";
						  
						  } else if (html=='false') {
								$("#add_err2").html('<div class="alert alert-danger"> \
													<strong>Authentication</strong> failure. \ \
												</div>');
								
						  
						  } else {
								$("#add_err2").html('<div class="alert alert-danger"> \
													<strong>Error</strong> processing request. Please try again. \ \
												</div>');
						  }
						},
						beforeSend:function()
						{
                            $("#add_err2").html("loading...");
						}
					});
					 return false;
				});
});
    </script>

</head>

<body>

    <div class="brand">The Perfect Cup</div>
    <div class="address-bar">3481 Melrose Place | Beverly Hills, CA 90210 | 123.456.7890</div>

    <!-- Navigation -->
    <?php require_once 'nav.php'; ?>

    <div class="container">
        <div class="row">
            <div class="box">
                <div class="col-lg-12">
                    
					<div class="alert alert-danger">
					<strong>You must be logged in to view the blog.</strong>
					</div>

					
					<hr>
                    <h2 class="intro-text text-center">
                        <strong>Login</strong>
                    </h2>
					<div id="add_err2"></div>
                    <hr>       
                    <form role="form">
                        <div class="row">
                            <div class="form-group col-lg-4">
                                <label>Email Address</label>
                                <input type="email" id="email" name="email" maxlength="25" class="form-control">
                            </div>
                            <div class="clearfix"></div>
                            <div class="form-group col-lg-12">
                                <label>Password</label>
                                <input type="password" id="password" name="password" maxlength="10" class="form-control">
                            </div>
                            <div class="form-group col-lg-12">
                                <button type="submit" id="login" class="btn btn-default">Login</button>
                            </div>
                        </div>
                    </form>
					
					<div class="form-group col-lg-12">
						<a href="register.php"><button type="submit" class="btn btn-default">Not a Member? Register here</button></a>
					</div>

					
                </div>
            </div>
        </div>

    </div>
    <!-- /.container -->

    <footer>
        <div class="container">
            <div class="row">
                <div class="col-lg-12 text-center">
                    <p>Copyright © The Perfect Cup 2016</p>
                </div>
            </div>
        </div>
    </footer>

    <!-- Bootstrap Core JavaScript -->
    <script src="js/bootstrap.min.js"></script>

</body>

</html>

驗證部分

用 POST 方法連到 pcheck.php 驗證email跟password
我們之後會聊這位 pcheck.php，現在繼續看下去
驗證成功
- alert出提示成功訊息並登入 blog.php 頁面

if(html=='true')
{
  $("#add_err2").html('<div class="alert alert-success"> \
                        <strong>Authenticated</strong> \ \
                    </div>');

    window.location.href = "blog.php";

驗證失敗
- alert出授權失敗訊息

else if (html=='false') {
    $("#add_err2").html('<div class="alert alert-danger"> \
                        <strong>Authentication</strong> failure. \ \
                    </div>');

window.location.href

windows.location.href=”/url” 當前頁面開啟URL頁面
還有其他兩種寫法
self.location.href=”/url
(this)location.href=”/url”

細談 location.href 與 location.replace 的差別與實務應用

總結

出現了新的一對 PHP，今天聊了關於 login.php，而明天我們再聊 pcheck.php，這兩位 php 跟之前 redister.php和 addduser.php，Day15 jQuery 與 Ajax 驗證註冊表單，有許多相似的點，都是前端介面搭配後端資料庫，用jQuery ajax方法搭配php，來連接MySQL資料庫。

謝謝你的收看，我們明天再見!