PHP实现简单注册登录详细代码

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我是靠谱客的博主糟糕大门，最近开发中收集的这篇文章主要介绍PHP实现简单注册登录详细代码，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

PHP实现简单注册登录详细全部代码先看演示~

示例图：

Ps.本人有点懒哈~ 就输出个成功算了吧~

PHP实现登录注册

index.php (首页)
login.php (登录)
register.php (注册)

代码里面注释写很详细了哦~ 废话不多说直接上代码~

index.php文件

代码如下：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Zhe - 注册登录</title>
<link rel="stylesheet" type="text/css" href="https://www.layuicdn.com/layui/css/layui.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 - 登录注册演示</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">注册</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">输入框</label>
			 <div class="layui-input-block">
			  <input type="text" name="username" placeholder="请输入账号" class="layui-input">
			 </div>
			 </div>
			 <div class="layui-form-item">
			 <label class="layui-form-label">密码框</label>
			 <div class="layui-input-block">
			  <input type="password" name="password" placeholder="请输入密码" 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="立即注册"/>
			 </div>
			 </div>
			</form>
  </div>
  </div>
 </div>
 <div class="layui-col-md6">
  <div class="layui-card">
  <div class="layui-card-header">登录</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">输入框</label>
			 <div class="layui-input-block">
			  <input type="text" name="username" placeholder="请输入账号" class="layui-input">
			 </div>
			 </div>
			 <div class="layui-form-item">
			 <label class="layui-form-label">密码框</label>
			 <div class="layui-input-block">
			  <input type="password" name="password" placeholder="请输入密码" 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="立即登录"/>
			 </div>
			 </div>
			</form>
  </div>
  </div>
 </div>
 </div>
</div>
<script type="text/javascript">
	// 验证输入不为空的脚本代码
	function checkForm(form) {
	if(form.username.value == "") {
	alert("用户名不能为空!");
	form.username.focus();
	return false;
	}
	if(form.password.value == "") {
	alert("密码不能为空!");
	form.password.focus();
	return false;
	}
	return true;
	}
</script>
</body>
</html>

代码如下：

<?php
	session_start();
	header("content-type:text/html;charset=utf-8");
	//连接数据库
	$link = mysqli_connect("localhost","pay_com_cn","pay_com_cn","pay_com_cn");
	if (!$link) {
		die("连接失败: " . mysqli_connect_error());
	}
	//接收$_POST用户名和密码
	$username = $_POST['username'];
	$password = $_POST['password'];
	//查看表user用户名与密码和传输值是否相等
	$sql = "SELECT * FROM user WHERE username = '$username' AND password = '$password'";
	//result必需规定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识符。
	$result = mysqli_query($link,$sql);
	$num = mysqli_num_rows($result);//函数返回结果集中行的数量
	//判断是否登录后显示或跳转
	if($num){
		echo '登录成功';
	}else{
		echo'登录失败';
	}
	mysqli_close($link);//关闭数据库
 ?>

代码如下：

<?php
	header("content-type:text/html;charset=utf-8");
	//连接数据库
	$link = mysqli_connect("localhost","pay_com_cn","pay_com_cn","pay_com_cn");
	if (!$link) {
		die("连接失败: " . mysqli_connect_error());
	}
	//接收$_POST用户名和密码
	$username=$_POST['username'];
	$password=$_POST['password'];
	//查看表user用户名是否存在或为空
	$sql_select = "SELECT * FROM user WHERE username = '$username'";
	//result必需规定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识符。
	$select = mysqli_query($link,$sql_select);
	$num = mysqli_num_rows($select);//函数返回结果集中行的数量
	if($username == "" || $password == "")
	{
		echo "请确认信息完整性";
	}else if($num){
		echo "已存在用户名";//已存在账户名输出错误
	}else{
			$sql="insert into user(username,password) values('$username','$password')";
			$result=mysqli_query($link,$sql);
			//判断是否注册后显示内容
			if(!$result)
			{
				echo "注册不成功！"."<br>";//输出错误
				echo "<a href='index.php'>返回</a>";//超链接到首页
			}
			else
			{
				echo "注册成功!"."<br/>";//输出成功
				echo "<a href='index.hphp'>立刻登录</a>";//超链接到首页
			}
		}
	
?>

最后附上本文用到的mysql表

注意先将数据库和user表字段创建完成在运行程序