PHP實現(xiàn)簡單注冊登錄詳細代碼

更新時間：2021年01月08日 17:34:45 作者：Zhe-w

這篇文章主要介紹了PHP實現(xiàn)簡單注冊登錄詳細全部代碼實例講解,代碼講解的很清楚，對這方面不懂的初學(xué)者可以照著練習(xí)研究下

PHP實現(xiàn)簡單注冊登錄詳細全部代碼先看演示~

示例圖：

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Ps.本人有點懶哈~ 就輸出個成功算了吧~

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PHP實現(xiàn)登錄注冊

index.php (首頁)
login.php (登錄)
register.php (注冊)

代碼里面注釋寫很詳細了哦~ 廢話不多說直接上代碼~

index.php文件

代碼如下：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Zhe - 注冊登錄</title>
<link rel="stylesheet" type="text/css"  rel="external nofollow" />
<script src="https://www.layuicdn.com/layui/layui.js" charset="utf-8"></script>
</head>
<body>
<fieldset class="layui-elem-field layui-field-title" style="margin-top: 20px;">
 <legend>Zhe - 登錄注冊演示</legend>
</fieldset> 
<div style="padding: 20px; background-color: #F2F2F2;">
 <div class="layui-row layui-col-space15">
 <div class="layui-col-md6">
  <div class="layui-card">
  <div class="layui-card-header">注冊</div>
  <div class="layui-card-body">
			<form class="layui-form" action="register.php" method="post" onsubmit="return checkForm(this)" lay-filter="example">
			 <div class="layui-form-item">
			 <label class="layui-form-label">輸入框</label>
			 <div class="layui-input-block">
			  <input type="text" name="username" placeholder="請輸入賬號" class="layui-input">
			 </div>
			 </div>
			 <div class="layui-form-item">
			 <label class="layui-form-label">密碼框</label>
			 <div class="layui-input-block">
			  <input type="password" name="password" placeholder="請輸入密碼" class="layui-input">
			 </div>
			 </div>			 
			 <div class="layui-form-item">
			 <div class="layui-input-block">
			  <input type="submit" class="layui-btn layui-btn-normal" value="立即注冊"/>
			 </div>
			 </div>
			</form>
  </div>
  </div>
 </div>
 <div class="layui-col-md6">
  <div class="layui-card">
  <div class="layui-card-header">登錄</div>
  <div class="layui-card-body">
			<form class="layui-form" action="login.php" method="post" onsubmit="return checkForm(this)" lay-filter="example">
			 <div class="layui-form-item">
			 <label class="layui-form-label">輸入框</label>
			 <div class="layui-input-block">
			  <input type="text" name="username" placeholder="請輸入賬號" class="layui-input">
			 </div>
			 </div>
			 <div class="layui-form-item">
			 <label class="layui-form-label">密碼框</label>
			 <div class="layui-input-block">
			  <input type="password" name="password" placeholder="請輸入密碼" class="layui-input">
			 </div>
			 </div>			 
			 <div class="layui-form-item">
			 <div class="layui-input-block">
				 <input type="submit" class="layui-btn layui-btn-normal" value="立即登錄"/>
			 </div>
			 </div>
			</form>
  </div>
  </div>
 </div>
 </div>
</div>
<script type="text/javascript">
	// 驗證輸入不為空的腳本代碼
	function checkForm(form) {
	if(form.username.value == "") {
	alert("用戶名不能為空!");
	form.username.focus();
	return false;
	}
	if(form.password.value == "") {
	alert("密碼不能為空!");
	form.password.focus();
	return false;
	}
	return true;
	}
</script>
</body>
</html>

login.php文件

代碼如下：

<?php
	session_start();
	header("content-type:text/html;charset=utf-8");
	//連接數(shù)據(jù)庫
	$link = mysqli_connect("localhost","pay_com_cn","pay_com_cn","pay_com_cn");
	if (!$link) {
		die("連接失敗: " . mysqli_connect_error());
	}
	//接收$_POST用戶名和密碼
	$username = $_POST['username'];
	$password = $_POST['password'];
	//查看表user用戶名與密碼和傳輸值是否相等
	$sql = "SELECT * FROM user WHERE username = '$username' AND password = '$password'";
	//result必需規(guī)定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的結(jié)果集標(biāo)識符。
	$result = mysqli_query($link,$sql);
	$num = mysqli_num_rows($result);//函數(shù)返回結(jié)果集中行的數(shù)量
	//判斷是否登錄后顯示或跳轉(zhuǎn)
	if($num){
		echo '登錄成功';
	}else{
		echo'登錄失敗';
	}
	mysqli_close($link);//關(guān)閉數(shù)據(jù)庫
 ?>

register.php文件

代碼如下：

<?php
	header("content-type:text/html;charset=utf-8");
	//連接數(shù)據(jù)庫
	$link = mysqli_connect("localhost","pay_com_cn","pay_com_cn","pay_com_cn");
	if (!$link) {
		die("連接失敗: " . mysqli_connect_error());
	}
	//接收$_POST用戶名和密碼
	$username=$_POST['username'];
	$password=$_POST['password'];
	//查看表user用戶名是否存在或為空
	$sql_select = "SELECT * FROM user WHERE username = '$username'";
	//result必需規(guī)定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的結(jié)果集標(biāo)識符。
	$select = mysqli_query($link,$sql_select);
	$num = mysqli_num_rows($select);//函數(shù)返回結(jié)果集中行的數(shù)量
	if($username == "" || $password == "")
	{
		echo "請確認(rèn)信息完整性";
	}else if($num){
		echo "已存在用戶名";//已存在賬戶名輸出錯誤
	}else{
			$sql="insert into user(username,password) values('$username','$password')";
			$result=mysqli_query($link,$sql);
			//判斷是否注冊后顯示內(nèi)容
			if(!$result)
			{
				echo "注冊不成功！"."<br>";//輸出錯誤
				echo "<a href='index.php'>返回</a>";//超鏈接到首頁
			}
			else
			{
				echo "注冊成功!"."<br/>";//輸出成功
				echo "<a href='index.hphp'>立刻登錄</a>";//超鏈接到首頁
			}
		}
	
?>

最后附上本文用到的mysql表

注意先將數(shù)據(jù)庫和user表字段創(chuàng)建完成在運行程序

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