新会话登录脚本不能在PHP中工作

我正在使用此脚本，请参阅下面的内容，我从该站点获取该脚本用于登录用户并根据登录名重定向到网页。它工作的很好，但我无法将用户名拉入他们被重定向到的页面。下面的新会话脚本通常适用于简单的脚本，但它似乎不适用于此重定向脚本。如果有人能指出我正确的方向，我会很感激，因为我对PHP很陌生，这是我的第一次尝试。谢谢艾伦新会话登录脚本不能在PHP中工作

重定向脚本很好。

<?php 
$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="trydata"; // Database name 
$tbl_name="users"; // Table name 

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['username']; 
$mypassword=$_POST['password']; 

// 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['username'] = $myusername; 
    $_SESSION['password'] = $mypassword; 

    $result = mysql_fetch_array($result); // get the result set from the query 

    $redirect = trim($result['redirect']); // get the redirect column's value 

    if ($redirect == '') { 
     echo "No redirect value was set!"; 
    } else { 
     header('Location: ' . $redirect); 
     exit; 
    } 
} else { 
    echo "Wrong Username or Password"; 
} 

?> 

New session script not pulling loin information through. 

<?php 
session_start(); // start up your PHP session! 


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

    echo "You are logged in as ".$_SESSION['username']; 
    echo "<p>"; 

    echo "<a href='logout.php'> Click here to logout<a/>"; 
    } 

else 

header ("Location: form.php"); 

?>

来源

2012-05-11 Alan Taylor

使用不同的教程学习PHP。你使用的是非常糟糕的。如果包含反斜杠并且未启用魔术引号，'stripslashes'将打断该字符串。（MQ已被弃用，并且是一件坏事） – ThiefMaster

感谢您的回复，它似乎与以下建议一起工作，我将为PHP获得更好的教程。再次感谢。关闭 –

尝试使用session_write_close在重定向之前：

if ($redirect == '') { 
    echo "No redirect value was set!"; 
} else { 
    session_write_close(); 
    header('Location: ' . $redirect); 
    exit; 
}

来源

2012-05-11 08:06:21 fcalderan

感谢您回复我的问题，现在请遵循上面的建议。再次感谢你的帮助。注意 –

所以请随时upvote /接受这个答案，并upvote其他所有有用的答案:) – fcalderan

确保您设置的session_start（）;在顶线上，<?php行均为您的脚本访问$ _SESSION数组。

来源

2012-05-11 08:06:37

<?php 
session_start(); <----------------Session should start here 
$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // Mysql password 
$db_name="trydata"; // Database name 
$tbl_name="users"; // Table name 

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['username']; 
$mypassword=$_POST['password']; 

// 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['username'] = $myusername; 
    $_SESSION['password'] = $mypassword; 

    $result = mysql_fetch_array($result); // get the result set from the query 

    $redirect = trim($result['redirect']); // get the redirect column's value 

    if ($redirect == '') { 
     echo "No redirect value was set!"; 
    } else { 
     header('Location: ' . $redirect); 
     exit; 
    } 
} else { 
    echo "Wrong Username or Password"; 
} 

?> 

New session script not pulling loin information through. 

<?php 



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

    echo "You are logged in as ".$_SESSION['username']; 
    echo "<p>"; 

    echo "<a href='logout.php'> Click here to logout<a/>"; 
    } 

else 

header ("Location: form.php"); 

?>

您需要在最开始时致电session_start()。

和我建议你学习PDO

来源

2012-05-11 08:11:38 itachi

感谢您的帮助，它现在完美，我会按照您的建议倾斜PDO。再次感谢非常感谢。 –

新会话登录脚本不能在PHP中工作

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