Php登录错误

-2

我得到这个错误，当我输入我的用户名和密码。Php登录错误

致命错误：调用到Z中未定义的函数了session_register（）：\ XAMPP \ htdocs中\ ZED \ checklogin.php在线路32

下面是代码。

main_login.php

<!DOCTYPE html> 
</html lang="en"> 
    <head> 
     <meta charset="utf-8"> 
     <title>Test</title> 
    </head> 
    </body> 
     <table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC"> 
     <tr> 
     <form name="form1" method="post" action="checklogin.php"> 
     <td> 
     <table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF"> 
     <tr> 
     <td colspan="3"><strong>Member Login </strong></td> 
     </tr> 
     <tr> 
     <td width="78">Username</td> 
     <td width="6">:</td> 
     <td width="294"><input name="myusername" type="text" id="myusername"></td> 
     </tr> 
     <tr> 
     <td>Password</td> 
     <td>:</td> 
     <td><input name="mypassword" type="text" id="mypassword"></td> 
     </tr> 
     <tr> 
     <td>&nbsp;</td> 
     <td>&nbsp;</td> 
     <td><input type="submit" name="Submit" value="Login"></td> 
     </tr> 
     </table> 
     </td> 
     </form> 
     </tr> 
     </table> 
    </body> 
</html>

checklogin

<?php 

$host="localhost"; // Host name 
$username="root"; // Mysql username 
$password="password"; // Mysql password 
$db_name="test"; // 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"; 
} 
?>

login_success.php

// Check if session is not registered, redirect back to main page. 
// Put this code in first line of web page. 
<?php 
session_start(); 
if(!session_is_registered(myusername)){ 
header("location:main_login.php"); 
} 
?> 

<html> 
<body> 
Login Successful 
</body> 
</html>

logout.php

// Put this code in first line of web page. 
<?php 
session_start(); 
session_destroy(); 
?>

来源

2014-11-25 Alec Grogan

见http://stackoverflow.com/questions/3682615/how-to-fix-the-session-register-deprecated-issue – 2014-11-25 00:34:18

石器时代代码，真的需要被移动到本世纪 – 2014-11-25 00:36:45

有趣的用途结束标签。 “”作为开始标签做什么？或''作为开标签？如果这确实来自教程，则需要从内存中清除它的所有存在。 – 2014-11-25 00:42:13

您正在关注一个非常旧的教程（^和错误的）教程。所有mysql_*功能过时，你应该寻找到PDO¹或MySQLi²

你的错误消息：

Fatal error: Call to undefined function session_register() in Z:\xampp\htdocs\zed\checklogin.php on line 32

国，由于session_register()也已经过时。您需要设置的值是这样的：

$_SESSION['username'] = 'theusername';

那么你的页面上，你检查，如果用户登录，您应该使用这样的事情：

session_start(); 
if(!isset($_SESSION['username']) || empty($_SESSION['username'])) { 
    die(header("Location: /login")); 
}

- PDO

- MySQLi

而且额外的饼干点，这里有一个例子PDO查询。

$db = new PDO('mysql:host=localhost;dbname=testdb;charset=utf8', 'username', 'password'); 
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); 

$stmt = $db->prepare("SELECT * FROM $tbl_name WHERE username=? and password=?"); 
$stmt->bindValue(1, $username, PDO::PARAM_STR); 
$stmt->bindValue(2, $password, PDO::PARAM_STR); 
if($stmt->execute()){ 
    if($stmt->rowCount() == 1) { 
     $data = $stmt->fetchObject(); 
     $_SESSION['username'] 
    } 
}

^{免责声明：以上是伪代码，我建议你看看PDO PHP的例子。}

来源

2014-11-25 00:40:13 Darren

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