PHP registration and login system simplified version, PHP login simplified version

PHP registration and login system simplified version, PHP login simplified version_PHP tutorial

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Release： 2016-07-12 08:57:34

Original

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Simplified version of php registration and login system, simplified version of php login

Login to the registration system is the most common operation on the Internet every day. I have set up a category to improve the registration and login system step by step. If Please forgive me if there is any mistake.

Language used: php

Database: mysql

The functions implemented this time:

1. User registration

2. User login

Main files:

Full code

1 sql creates a user table in an existing database, with three fields: id, username, and password

Copy code The code is as follows: create table user(id int(10) not null auto_increment,username varchar(30),password varchar(40),primary key(id) );

2 connect.php database configuration file

<&#63;php
  $server="localhost";//主机
  $db_username="";//你的数据库用户名
  $db_password="";//你的数据库密码

  $con = mysql_connect($server,$db_username,$db_password);//链接数据库
  if(!$con){
    die("can't connect".mysql_error());//如果链接失败输出错误
  }
  
  mysql_select_db('test',$con);//选择数据库（我的是test）
&#63;>

Copy after login

3 signup.html registration form

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>用户注册页面</title>
  </head>
  <body>
    <form action="signup.php" method="post">
      <p>用户名:<input type="text" name="name"></p>
      <p>密 码: <input type="text" name="password"></p>
      <p><input type="submit" name="submit" value="注册"></p>
    </form>
  </body>
</html>

Copy after login

4 signup.php registration process

<&#63;php 
  header("Content-Type: text/html; charset=utf8");

  if(!isset($_POST['submit'])){
    exit("错误执行");
  }//判断是否有submit操作

  $name=$_POST['name'];//post获取表单里的name
  $password=$_POST['password'];//post获取表单里的password

  include('connect.php');//链接数据库
  $q="insert into user(id,username,password) values (null,'$name','$password')";//向数据库插入表单传来的值的sql
  $reslut=mysql_query($q,$con);//执行sql
  
  if (!$reslut){
    die('Error: ' . mysql_error());//如果sql执行失败输出错误
  }else{
    echo "注册成功";//成功输出注册成功
  }

  

  mysql_close($con);//关闭数据库

&#63;>

Copy after login

The registration process is completed, the following is the user login

5 login.html login form

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>登陆</title>
  </head>
  <body>
    <form name="login" action="login.php" method="post">
        <p>用户名<input type=text name="name"></p>
        <p>密 码<input type=password name="password"></p>
        <p><input type="submit" name="submit" value="登录"></p>
      </form>
  </body>
</html>

Copy after login

6 login.php login program

<&#63;PHP
  header("Content-Type: text/html; charset=utf8");
  if(!isset($_POST["submit"])){
    exit("错误执行");
  }//检测是否有submit操作 

  include('connect.php');//链接数据库
  $name = $_POST['name'];//post获得用户名表单值
  $passowrd = $_POST['password'];//post获得用户密码单值

  if ($name && $passowrd){//如果用户名和密码都不为空
       $sql = "select * from user where username = '$name' and password='$passowrd'";//检测数据库是否有对应的username和password的sql
       $result = mysql_query($sql);//执行sql
       $rows=mysql_num_rows($result);//返回一个数值
       if($rows){//0 false 1 true
          header("refresh:0;url=welcome.html");//如果成功跳转至welcome.html页面
          exit;
       }else{
        echo "用户名或密码错误";
        echo "
          <script>
              setTimeout(function(){window.location.href='login.html';},1000);
          </script>

        ";//如果错误使用js 1秒后跳转到登录页面重试;
       }
       

  }else{//如果用户名或密码有空
        echo "表单填写不完整";
        echo "
           <script>
              setTimeout(function(){window.location.href='login.html';},1000);
           </script>";

            //如果错误使用js 1秒后跳转到登录页面重试;
  }

  mysql_close();//关闭数据库
&#63;>

Copy after login

7 welcome.html Login successful jump page

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>登陆成功</title>
  </head>
  <body>
    欢迎光临
  </body>
</html>

Copy after login

At this point, a simple and complete registration and login system is completed. The code is very simple and does not consider verification security and robustness. It will be improved later.

I hope this article will help you learn PHP programming.

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