Function to record how many times the user logs in

Connect to the database first：

you can create a new php file :

The following code:

php file name is conn.php

<?php

    header("Content-type:text/html;charset=utf-8");

    $conn = mysql_connect('localhost','root','') or die('Server connection failed');

    mysql_select_db('database name') or die('database nonexistence');;

    mysql_query('set names utf-8');

?>

you can create a new php file :

The following code:

php file name is login.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>login</title>

</head>

<body>

    <form action="logindo.php" method="post">

       users: <input name="name" type="text"/><br/>

       cipher:<input name="password" type="password"/></br>

       <input type="submit" name="sub" value="submit"/>

    </form>

</body>

</html>

you can create a new php file :

The following code:

file named :logindo.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>login handling</title>

</head>

<body>

<?php

    if(isset($_POST['sub'])){

       include('conn.php');

       $name = $_POST['name'];

       $password = $_POST['password'];

       $sql = "select * from tb_name where name = '$name' and password = '$password'";

       $r = mysql_query($sql);

       if($row = mysql_fetch_array($r)){

           session_start();

           $_SESSION['name']=$row['name'];

           $ac = 0;

           if(file_exists("acc.txt")){

               $ac = file_get_contents("acc.txt");

           }

           $ac++;

           file_put_contents("acc.txt",$ac);

           echo '<script>alert('login success');location.href="index.php";</script>';

           }else{

           echo '<script>alert("user name or password error");location.href="login.php";</script>';

           }

        }else{

        echo '<script>alert("user name or password error");location.href="login.php";</script>';

     }else{

     echo '<script>alert("user name or password error");location.href="login.php";</script>';

     }

?>

</body>

</html>

you can create a new php file :

The following code:

index.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>User registration login procedure</title>

</head>

<body>

<?php

  session_start();

  if(isset($_SESSION['name'])){

    echo 'welcome'.$_SESSION['name'];

    echo "<br>";

    $ac = file_get_contents("acc.txt");

    echo "you are".$ac."visitor";

    }else{

    echo "<script>alert('please login');location='loginl.php';</script>";

    }

?>

<a href="exit.php">Logged out</a>

</body>

</html>

you can create a new php file :

The following code:

file name is exit.php

<?php

  header("Content-type:text/html;charset=utf-8");

  session_start();

  unset($_SEEION['name']);

  echo '<script>alert("exit the success");location="login.php";</script>';

?>

The datadase is as follows:

create database (database);

use (database);

create table (table_name);

create table 'table_name'  ( 'id' int(4) not null auto_increment primary key,'name' varchar(50) character set utf8 collate utf8_unicode_ci not null,'password' varchar(50) character set utf8 collate utf8_unicode_ci not null,'createtime' datetime not null ) engine = myisan character set utf8 collate utf8_unicode_ci;

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