PHP Programming/Comparison

The operators for comparison in PHP are the following:

Operator	Name	Returns true, if…
==	equal	left & right side equals
===	identical	== is true, and both sides have the same type
!=	not equal	left & right are not equal after type juggling
<>	not equal	synonym of !=
!==	not identical	!= is true, or their types differ
<>	not equal	synonym of !=
<	less than	left side is strictly less than right side
>	greater than	left side is strictly greater than right side
<=	less than or equal to	left side is less than or equal to right side
>=	greater than or equal to	left side is greater than or equal to right side
<=>	spaceship	integer less than, equal to, or greater than zero when left side is respectively less than, equal to, or greater than right side (≥ PHP 7).
$a ?? $b ?? $c	null coalescing	first operand from left to right that exists and is not NULL. NULL, if no values are defined and that not NULL (≥ PHP 7).

Example of comparisons

This example sets and prints arrays.

PHP Code:

<?php
$value1 = 5;
$value2 = 7;

if ($value1 == $value2) {
 print('value1 is equal to value2');
} else {
 print('value1 is unequal to value2');
}
?>

PHP Output:

value1 is unequal to value2

HTML Render:

value1 is unequal to value2

External Links

• PHP Manual on Comparison Operators