Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Testing if class is defined returns a notice

Posted on 2013-11-09
2
Medium Priority
?
187 Views
Last Modified: 2013-11-09
Im trying to check if a class is defined, and if it isnt then define it, so I used:-
if (!class_exists(DB)) {
     echo "Class doesnt exist";
}

Open in new window


However when I run it, I get the echo statment, but along with:-
Notice: Use of undefined constant DB - assumed 'DB' in /var/www/vhosts/htdocs/dbConf.php on line 15

I know I can swtich warnings and notices off, but during development I prefer to keep them switched on.

Ive also tried using:-
if (!defined(DB)) {
     echo "Class doesnt exist";
}

Open in new window


But get the same results :-S

Any advice???
0
Comment
Question by:tonelm54
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 31

Accepted Solution

by:
Marco Gasi earned 2000 total points
ID: 39635570
You have to use quotes:

if (!class_exists('DB')) {
     echo "Class doesnt exist";
}

Open in new window

0
 
LVL 31

Expert Comment

by:Marco Gasi
ID: 39635571
Function class_exists89 requires the first parameter is a string, taht is the class name, not the class itself: http://php.net/manual/en/function.class-exists.php

Cheers
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

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

Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit (http://en.wikipedia.org/wiki/PHPUnit) and similar technologies have enjoyed wide adoption, making it possib…
These days socially coordinated efforts have turned into a critical requirement for enterprises.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
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 …

705 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