Solved

Catching a failed require_once that gets page from a function

Posted on 2008-10-10
2
156 Views
Last Modified: 2008-10-14
I'm working on a new function that builds my output page to separate my code from my content when I ran into a snag--my normal line of thinking doesn't work.

My cheap and easy was to deal with a failed require_once is to toss the user to the 404 like so:
      if(file_exists("../site/siteclass.php"))
            require_once("../site/siteclass.php");
      else
            header('Location: http://intranet/404.php');

But when my require_once is the output of a function rather than a file, my normal trick doesn't work:
      if(file_exists($SITE->displayoutput()))
            require_once($SITE->displayoutput());
      else
            header('Location: http://intranet/404.php');

The IF statement returns a fatal error when the $SITE->displayoutput() function doesn't exist.

Help my fried brain, how do I change my code to catch when require_once's target function fails/doesn't exist. I purposely have my singleton include commented out to force the failure so I can learn how to catch it.
<?php

	/* commented out to force the next step to fail

	   to learn how to catch the failure

		//Get the SITE Singleton

		if(file_exists("../site/siteclass.php"))

			require_once("../site/siteclass.php");

		else

			header('Location: http://intranet/404.php');

	*/
 

	//Get the output from the SITE Singleton

	if(file_exists($SITE->displayoutput()))

		require_once($SITE->displayoutput());

	else

		header('Location: http://intranet/404.php');

?>

Open in new window

0
Comment
Question by:dban00b
2 Comments
 
LVL 39

Accepted Solution

by:
Roger Baklund earned 500 total points
ID: 22691778
Try using isset() and method_exists(), something like this:


if(isset($SITE) and 

   method_exists($SITE,'displayoutput') and 

   file_exists($SITE->displayoutput()))

                require_once($SITE->displayoutput());

        else

                header('Location: http://intranet/404.php');

Open in new window

0
 
LVL 1

Author Comment

by:dban00b
ID: 22711907
Those two extra functions do indeed catch it! Thanks.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Generating table dynamically is the most common issue faced by php developers.... So it seems there is a need of an article that explains the basic concept of generating tables dynamically. It just requires a basic knowledge of html and little maths…
This article discusses how to create an extensible mechanism for linked drop downs.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now