[SOLVED] Class not available in ajax post

DjMikeS · September 4, 2008

Hi all,

I have been breaking my head over this one and I can't seem to figure it out...

The problem:

I have an AJAX login form which posts the data (username and password) to checklogin.php.

Checklogin.php then includes some files to do the actual checking and returns a value indicating the status.

Now I have a class (register) which I use to set variables that need to be available throughout the website.

However, when I try to set a variable ( $registry->set ('testvar', 'testval'); ) I get the following error:

Fatal error: Call to a member function set() on a non-object in /var/www/dev.phison.nl/test/users/functions/user_login.php on line 17

Here is the relevant code:

Main index.php:

<?php
require 'main_includes/init.php';
require $site_path . 'main_classes/databuffer.pclass';

if (!$registry['loginstatus']) {
$registry->set ('action', 'login');
$registry->set ('section', 'users');
}
require $site_path . 'main_includes/header.php';

if ($registry['section']) {
require $site_path . $registry['section'] . "/index.php";
}
?>
<body>
<div class="global">
<div class="header"></div>
<?php echo $cntBody; ?>

</div>
</body>

The header which includes the javascript file:

<!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" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html" />
<script src="jscript/jquery.js" type="text/javascript" language="javascript"></script>
<?php
if ($registry['section']) {
echo "<link href='" . $registry['section'] . "/css/style.css' rel='stylesheet'type='text/css' />\n
	  <script src='" . $registry['section'] . "/jscript/" . $registry['action'] . ".js' type='text/javascript' language='javascript'></script>\n";
}
echo "<title>:: Phison Admin Panel 2K - " . $registry['action'] . "</title>";
?>
<link href="css/style.css" rel="stylesheet" type="text/css" />
<!--[if lte IE 7]>  
<link href="css/style-ie.css" rel="stylesheet" type="text/css" />
<![endif]-->
</head>

The jscript file:

$(document).ready(function()
{
$("#login_form").submit(function() {
	$("#msgbox").removeClass().addClass('check').html('<img src="../../../img/wait.gif" />').fadeIn(1000);
	var username = $("#username").val();
	var password = $("#password").val();
	$.post("users/checklogin.php",{ username: username, password: password }, function(data) {
		if(data=='0') {
			$("#msgbox").removeClass().addClass('error').html('<b>An error occurred.</b><br /><br />You haven\'t entered a username or password.');
		}
		else if(data=='1') {
			$("#msgbox").removeClass().addClass('error').html('<b>An error occurred.</b><br /><br />The username and password combination is not correct.');		
		}
		else if(data=='2') {
			$("#msgbox").removeClass().addClass('error').html('<b>An error occurred.</b><br /><br />There was an unknown error while trying to log you in. Please try again.');
		}
		else if(data=='3') {
			$("#msgbox").removeClass().addClass('loginok').html('Logging in.....');
			//redirect to secure page
			document.location='index.php';
		}
		else {
			$("#msgbox").removeClass().html('<b>An error occurred.</b><br />' + data).addClass('error');	
		}
	});
	return false; //not to post the form physically
});
});

The index.php in the users dir:

<?php
if (isset($_GET['cmd'])) {
switch ($_GET['cmd']) {
case 'logout' :
	logout();
	echo "<script type='text/javascript'>window.location = '../index.php'</script>";
	die();
default: 
	break;
}
}

$tplLogin = new DataBuffer();
?>
<span id="msgbox"></span>
<fieldset class="fieldset_login">
<legend align="center">Please login</legend>
<form method="post" action="" id="login_form" />
<label for="username" class="login">Username:</label><input name="username" type="text" id="username" value="" maxlength="20" class="textlogin" />
<label for="Password" class="login">Password:</label><input name="password" type="password" id="password" value="" maxlength="20" class="textlogin" /><br />
<center><input name="submit" type="submit" value="Login" class="submitlogin" id="submit" /></center>
</form>
</fieldset>

<?php
$cntBody = $tplLogin->close();
?>

The checklogin.php:

<?php
include ("../main_includes/db.php");
require "functions/check_credentials.php";
require "functions/check_form_empty.php";
require "functions/user_login.php";
require "functions/user_logout.php";

$username = mysql_real_escape_string($_POST['username']);
$password = sha1($_POST['password']);
$checkFormEmpty = checkFormEmpty($_POST['username'], $_POST['password']);
if (!$checkFormEmpty) {
echo "0";
}
elseif ($checkFormEmpty) {
$checkCredentials = checkCredentials($username, $password);
if (!$checkCredentials) {
	echo "1";
}
elseif ($checkCredentials) {
	$userLogin = userLogin($username, $password);
	if (!$userLogin) {
		echo "2";
	}
	else {
		echo "3";
	}
}
}
?>

I'll only show check_form_empty.php here, because the rest of the function scripts return the same:

<?php
function checkFormEmpty($username, $password) {
if (empty($username)) {
	return false;
}
elseif (empty($password)) {
	return false;
}
else {
	return true;
}
}
?>

I think that the ajax post in the jscript file calls the checklogin.php outside of the environment so that eg. the registry class is not available.

Is there a way to solve this without including the registry.pclass file in the checklogin script ?

If you want to check it out: https://dev.phison.nl/test/

And I know it uses an invalid security certificate I still need to change that.... ::)

Thanks in advance.

PFMaBiSmAd · September 4, 2008

Web servers are stateless (when the request for a page is completed all resources used on that page are destroyed) and each request is completely separate, including requests made by AJAX.

Any page requested is its own separate island. Nothing is shared or persists on the server between pages or requests for the same page.

ranjuvs · September 4, 2008

have u included the class file and instantiated the object?

Regards

Ranju

DjMikeS · September 4, 2008

So you say that I need to include registry.pclass if I want to use that class ?

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[SOLVED] Class not available in ajax post

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