一、先看演示~
就输出个成功算了吧~
二、代码
代码里面注释写很详细了哦~ 废话不多说 直接上代码~
index.php
<!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" />
<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>
login.php
<?php
session_start();
header("content-type:text/html;charset=utf-8");
//连接数据库
$link = mysqli_connect("localhost","QQ1617184046","QQ1617184046","QQ1617184046");
if (!$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
?>
register.php
<?php
header("content-type:text/html;charset=utf-8");
//连接数据库
$link = mysqli_connect("localhost","QQ1617184046","QQ1617184046","QQ1617184046");
if (!$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
}
}
?>
以上就是一个简单的PHP注册登录页面了~
需要注意的是 密码在写入的时候需要作一下加密操作。代码为演示代码 可以自行修改。
标签：return,登录,form,可供参考,代码,echo,注册,PHP From： https://www.cnblogs.com/shanwei/p/17574672.html