PHP安全登录 – 密码加密

发布时间：2020-12-13 18:06:28 所属栏目：PHP教程来源：网络整理

导读：以下是要实施安全登录的登录系统/ main_login.php form name="form1" method="post" action="checklogin.php" Username:input name="myusername" type="text" id="myusername" / br / Password:input name="mypassword" type="password" id="mypassword" / i

以下是要实施安全登录的登录系统/

main_login.php

    <form name="form1" method="post" action="checklogin.php">
    Username:<input name="myusername" type="text" id="myusername" /> <br />
    Password:<input name="mypassword" type="password" id="mypassword" />
    <input type="submit" name="Submit" value="Login" />
    </form>

Checklogin.php

<?php
ob_start();
$host="localhost"; // Host name 
$username="root"; // Mysql username 
$password=""; // Mysql password 
$db_name="cosmos"; // 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");

// Define $myusername and $mypassword 
$myusername=$_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";
}

ob_end_flush();
?>

login_success.php

<?php
session_start();

if(isset($_SESSION['username']) && ($_SESSION['username'] == $myusername)){
header("location:main_login.php");
}
?>

<html>
<body>
Login Successful. <a href="logout.php">Logout</a>
</body>
</html>

logout.php

<?php
session_destroy();

header("location:main_login.php");
?>

问题是我想通过密码加密或任何其他方法(如果有的话)进行安全登录.我是PHP的初学者

您可以使用md5将密码加密到一定程度.您需要在用户注册时和登录md5之前输入密码md5 ….

例：

//定义$myusername和$mypassword
$名为myUsername = $_ POST [ ‘名为myUsername’];
$输入mypassword = $_ POST [ ‘输入mypassword’];
$mypassword = md5($mypassword);

每当您有用户注册时,您还需要使用此功能.

（编辑：李大同）

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