PHP Operators: Relation Operators

PHP Operators Step By Step Tutorial - Part 6: Relation operator or which also referred as comparison operator is the operator that is used to conduct a comparison between two value or expression in order to get the result of true and false.

Table Relationship Operator

Operator	Info	example
==	Equal to	$x = 3; $y = 4; $x == $y	// the result : false or 0 True if $x is equal to $y
!= or <>	Unegual	$x = 3; $y = 4; $x == $y	// the result : true or 1 True if $x is unegual than $y
===	Identik	$x = 2; $y = 2; $x === $y	//the result : true or 1 True if $x is equal to $y as well as owning is the same type
!==	Not Identik	$x = 2; $y = 5; $x !== $y	//the result : false or 0 True if $x is not equal to $y or also both do not have is the same type
>	Bigger	$x = 2; $y = 5; $ x >$y	//the result : false or 0 True if $x is bigger than $y
<	Smaller	$x = 2; $y = 5; $ x <$y	//the result : true or 1 True if $x is smaller than $y
>=	Bigger or equal to	$x = 2; $y = 5; $ x >=$y	//the result : false or 0 True if $x is bigger or equal to $y
<=	Smaller or equal to	$x = 2; $y = 5; $ x <=$y	//the result : true or 1 True if $x is smaller or equal to $y

Pay attention to the example of using relationship operator at script as following:

File name: relationoperator.php

<html>
<head>
<title>Using Relation Operator</title>
</head>

<body>
<h1>The example for using relation operator</h1>
<?
$s = 100;
$a = 50;
$y = "310 pack";
$i = "me";
$o = "you";
printf ("$s == $a :%d <br>", $s==$a);
printf ("$s != $a :%d <br>", $s!=$a);
printf ("$s <> $a :%d <br>", $s<>$a);
printf ("$s === $y :%d <br>", $s===$y);
printf ("$s !== $y :%d <br>", $s!==$y);
printf ("$s > $a :%d <br>", $s > $a);
printf ("$i > $o :%d <br>", $i > $o);
printf ("$s < $a :%d <br>", $s < $a);
printf ("$i < $o :%d <br>", $i < $o);
printf ("$s >= $a :%d <br>", $s >= $a);
printf ("$i >= $o :%d <br>", $i >= $o);
printf ("$s <= $a :%d <br>", $s <= $a);
printf ("$i <= $o :%d <br>", $i <= $o);
?>
</body>
</html>

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