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>
