PHP实现注册登录的详细代码,可供参考

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。

  

 

posted @ 2023-07-23 09:10  善為  阅读(187)  评论(0)    收藏  举报
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