许多人可能会使用 PHP MySQL 函数作为网站的登录部分
我正在尝试使用此代码；
在每个内容页面上 - 检查是否登录
<?php
session_start();
if( isset($_SESSION[$myusername]) ){
header("location:main_login.php");
}
?>
检查登录脚本
<?php
$host="**"; // Host name
$username="**"; // Mysql username
$password="**"; // Mysql password
$db_name="ClubEvents"; // Database name
$tbl_name="members"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// username and password sent from form
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);
// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register("myusername");
session_register("mypassword");
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
?>
注销代码
<?php
session_start();
session_unset();
header("Location: main_login.php");
?>
但是有些东西不起作用，该页面login_success.php应该只有在登录时才能访问，所以要么注销不起作用，要么login_success.php检查不起作用。但我不知道该怎么说，我试过和他们一起玩，还是没有进一步的前进。