what is isset

[geyids]

What is

PHP: Select all

<?php
if(isset($test)) {
?>

I have come along it many times but I dont know what it does

Regards John

[1840dsgn]

It means if the variable $test has a value or "is set" (isset)...then do whatever is in the curly braces!

[geyids]

mmh more questions comin on this. I got that thanks

[alexgeek]

another useful one is !isset (if it isn't set)

[geyids]

Originally Posted by alexgeek

another useful one is !isset (if it isn't set)

Is the only difference from the above one this mark?

Code: Select all

!

[1840dsgn]

yea a ! means not so..

PHP: Select all

if(!isset($number))   {
} 

means if the variable $number is not set...

PHP: Select all

if($number != 2)  {
} 

means if the variable $number is not equal to 2

etc

[geyids]

mmh thanx didnt know that