I am working on a set of PHP framework so to speak, designed to create
module based community & content management based scripts. I just started
updating the authentication handlers, which are all PHP 4 classes, and
reworking a long list of changes. The new version i am coding is near
completely incompatible with the old version hence it is extremely hard for
me to compare the new to the old for these errors.
The problem here is PHP is returning the error "Fatal error: Call to a
member function on a non-object in
/home/thenubs/public_html/nauth7b/classes/Auth.class.php on line 24"
Out of this I have two questions which are
First, if a fatal error is occurring on line 24, why is it executing line 24
successfully and returning data?
And second, if there?s a fatal error on line 24, why is line 25 still
processed?
If anyone sees an alternative way to do what I am doing that might work
better to solve the script errors then I am more than welcome to it as well
seeing how my goal is just to get the script to run right. It seems like
this might just be an error in PHP anyways, but I haven?t found anything on
the net about similar occurrences yet.
The explanation and all of the code that you should need in order to see
what?s going in is below.
The output of the entire page is:
SELECT userid, username, password FROM users WHERE username='XeRnOuS'
Resource id #15
stdClass Object ( [userid] => 1 [username] => XeRnOuS [password] =>
$1$684gXdqL$MwtGhJGa7WkEbQoXe/474. ) 55
Fatal error: Call to a member function on a non-object in
/home/thenubs/public_html/nauth7b/classes/Auth.class.php on line 24
Finally here is the code for the first part of the Auth class that i am
working on.
<?php
class Auth
{
var $loggedIN = false;
var $userID = null;
var $authSID;
var $userIP;
var $sql;
var $err;
var $perms;
var $config;
var $userperms = null;
function Auth(&$sql, &$err, &$perms)
{
//set realtive variables for the sql, err, and perms classes
into the current class for easy access.
$this->sql = &$sql;
$this->err = &$err;
$this->perms = &$perms;
$this->config = &$GLOBALS['config'];
$userdat = $sql->fetch_object($sql->query("SELECT userid,
username, password FROM users WHERE username='XeRnOuS'"));
echo '<h1>';print_r($userdat); echo '55</h1>';
$this->authSID = session_id();
$this->userIP = $_SERVER['REMOTE_ADDR'];
if(!is_object($this->sql)) echo '<h1>$sql IS NOT VALID
OBJECT</h1>';
if(!method_exists($this->sql, 'query')) echo '<h1>QUERY IS
NOT A VALID METHOD</h1>';
//destroy timed-out login sessions. Standard users will stay
logged for 1 hour before session is destroyed
$time = time() - 60 * 60; #60 minutes * 60 seconds per
minute = 1 hour ago.
//if user is logged into the website, update it in
$this->loggedIN for quick access for class
//also change $this->userperms from guest permissions to
$this->userID's specific permissions.
if($_SESSION['loggedIN'] === true &&
!is_null($_SESSION['userID']))
{
//check to see if user's session is still active in
sql.auth_sessions
if($this->Auth($_SESSION['userID'], session_id(),
$_SESSION['userIP']))
{
$this->userID = $_SESSION['userID'];
$this->userperms =
$this->perms->getUserPerms($this->userID);
//check to see if sql.auth_sessions.flogout
is set, force user logout if is
//otherwise update
sql.auth_sessions.lastaccess to current unix time stamp
$userdat =
$this->sql->fetch_object($this->sql->query("SELECT flogout FROM
auth_sessions WHERE userID=\"$this->userID\" AND authSID=\"$this->authSID\"
AND userIP=\"$this->userIP\""));
if($userdat->flogout === 1)
{
$this->Logout();
}
else
{
$this->sql->query("UPDATE
auth_sessions SET lastaccess=\"".time()."\" WHERE userID=\"$this->userID\"
AND authSID=\"$this->authSID\" AND userIP=\"$this->userIP\"");
}
}
else
{
//users session has timed out, unset session
information, for auth, set userperms to guest permissions
$_SESSION['loggedIN'] = false;
$_SESSION['userID'] = null;
$this->userperms = $perms->getGuestPerms();
}
}
else
{
//set user permissions file to guest permissions
$this->userperms = $this->perms->getGuestPerms();
}
return true;
}
As you can see i have three main classes, and the scripts use pointers to
point to the original definitions of these classes to simplify the access
and save memory.
$sql is a class that has all the php4 compatible mysql functions defined in
it. The syntax is the same as normal mysql function calls, but i added
additional processing and error handling on the side of them, and changed a
few of the default values. This is mostly used for development purposes so i
can debug everything quickly.
the $sql->query function has the following code in it:
function query($res, $fatal=0)
{
echo '<h3>'.$res;
$res = mysql_query($res, $this->db_link);
if(!$res)
{
$this->addError('SQL->query', 'SQL Error', 'Failed to
execute the MySQL Query.', $fatal);
}
else
{
echo ' '.$res.'</h3>';
return $res;
}
return false;
}
Now when we look at line 24 and 25 of the Auth class i have there, we find
these two lines specifically
$userdat = $sql->fetch_object($sql->query("SELECT userid,
username, password FROM users WHERE username='XeRnOuS'"));
echo '<h1>';print_r($userdat); echo '55</h1>';
with that in mind its easy to see how the data is generated for the most
part.
it calls sql->query which outputs the SQL query and the resource id for that
sql query, defines the object, then outputs what the objects values are with
the letter 55 in big h1 letters.
It's calling both of those SQL functions properly otherwise it wouldn?t be
displaying any data.
Yet for some reason it is saying that there?s a Fatal Error on line 24, and
I?m calling a member function on a non-object.
Hence once more my questions are:
First, if a fatal error is occurring on line 24, why is it executing line 24
successfully and returning data?
Second, if there?s a fatal error on line 24, why is line 25 still processed?
I've been working on this for the better part of four hours and i would
appreciate any help you guys can give me.
Thanks
- XeRnOuS
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