Question

What is the simplest most basic way to find out if a number/variable is odd or even in PHP?
Is it something to do with mod?

I’ve tried a few scripts but.. google isn’t delivering at the moment.

Answer 1

You were right in thinking mod was a good place to start. Here is an expression which will return true if $number is even, false if odd:

$number % 2 == 0

Works for every integer^PHP value, see as well Arithmetic Operators^PHP.

Example:

$number = 20;
if ($number % 2 == 0) {
  print "It's even";
}

Output:

It’s even