Hi,

I'm getting the error

"PHP has encountered an Access Violation at XXXXXXX..."

with a site I'm working on.

It happens on occasion when I load a page but not all of the time.

Is this is a problem with my code or is it a problem with my web server?

Cheers.

Does it say the error was on a line? Or just say access violation? Are you sure that your host has php enables?

The message seems to have actually gone now.

Everything was fine for days then suddenly the server seemed to come down and when it came back up, I was getting that Access Violation at random points in the site.

I'm assuming that since it's gone away, it was a problem on the hosting company's end.

Cheers.

It sounds like more of a server problem than a code problem..  can you post the PHP script that was giving you this error?

It was quite a large site but it started happening after I created a class and instantiated it on a page like this:

include('resource/include/global.php');
include('resource/include/page.php');

$page = new page($_GET['section'], $_GET['page'], $db);

echo $page->title;

etc.

The $db varaible is my PEAR db connection.

I thought it might have something to do with the fact that many instances of the object were being created but I wasn't destroying them.

Cheers.

Yeah that could definitely do it.  The server probably ran out of data memory space for these objects if you do not destroy them properly.

How do I destroy an object properly?

Currently I have the function:

        function destroy()
  {
           settype(&$this, 'null');
      }

Would this do it? Would I just call this at the end of each my scripts?

I heard that the usual deconstructor was flawed and didn't always work properly.

Any ideas?

Cheers.

You can just use the unset() variable just as any other variable.  So to delete the object named Object1 use



The unset function will determine that it is an object and call the objects destructor function.

Hope that helps.

Thanks for the help.

I've included a footer to make sure the page objects which I create are destroyed properly.

However, I've got a question about sessions and the use of objects within them.

I have a user login and authentication script set up. The authentication script checks the login details and, if they are correct, instantiates a user object with information about that user. The object is then made available through a session.

Code looks like this:

while( $row = $result->fetchrow(DB_FETCHMODE_ASSOC) )
{
    if($_POST['username']==$row[username] && $_POST['password']==$row[password])
    {
           $user = new user($row[user_id], $row[username], $row[password], $row[firstname], $row[surname], $row[department], $row[email]);
             $_SESSION['valid_user'] = $user;
  }              
}

When the user logs out, I destroy sessions using session_destroy() but as far as I'm aware, this won't unset the object variable will it?

Where do I do this? In the logout script or at the end of the authentication script once the session has been made?

Cheers.

You would want to do this in the logout script.  What object are you talking about unsetting?  The $_SESSION array?  If so, you can use the unset() function to do this as well when the user logs out before you call session_destroy( ).

Sorry, I mean destroying the $user instance I created in the script before putting it into the session.

Where do I kill that? In the script or when the user logs out?