PHP

Comparison Operators

Comparison operators allow you to compare two values. They return a Boolean value (either true or false) based on whether the operands match the condition.

If you compare an integer with a string, the string is converted to a number. If you compare two numerical strings, they are compared as integers.

Operator	Description	Example
==	Equal	$a==$b returns true if $a is equal to $b.
===	Identical	$a===$b returns true if $a is equal to $b, and they are of the same type.
!=	Not Equal	$a!=$b returns true if $a is not equal to $b.
<>	Not Equal	$a<>$b returns true if $a is not equal to $b.
!==	Not Identical	$a!==$b returns true if $a is not equal to $b, or they are not of the same type.
<	Less than	$a<$b returns true if $a is strictly less than $b.
>	Greater than	$a>$b returns true if $a is strictly greater than $b.
<=	Less than or equal to	$a<=$b returns true if $a is less than or equal to $b.
>=	Greater than or equal to	$a>=$b returns true if $a is greater than or equal to $b.

<html>
<head>
<title>PHP</title>
<meta Name="Author" Content="Hann So">
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<body>
<p>
<?php
$a = 1;
$b = 2;
$c = 2;
echo "a = ", $a,"<br />b = ",$b, "<br />c = ", $c, "<br />";
echo "The value of a==b is: ", $a==$b, "<br />";
echo "The value of a===b is: ", $a===$b, "<br />";
echo "The value of b===c is: ", $b==$c, "<br />";
echo "The value of a!=b is: ", $a!=$b, "<br />";
echo "The value of a<>b is: ", $a<>$b, "<br />";
echo "The value of b==c is: ", $b==$c, "<br />";
echo "The value of a!==b is: ", $a!==$b, "<br />";
echo "The value of b!==c is: ", $b!==$c, "<br />";
echo "The value of a<b is: ", $a<$b, "<br />";
echo "The value of a>b is: ", $a>$b, "<br />";
echo "The value of a<=b is: ", $a<=$b, "<br />";
echo "The value of a>=b is: ", $a>=$b, "<br />";
echo "The value of b<c is: ", $b<$c, "<br />";
echo "The value of b>c is: ", $b>$c, "<br />";
echo "The value of b<=c is: ", $b<=$c, "<br />";
echo "The value of b>=c is: ", $b>=$c, "<br />";
?>
</p>
</body>
</html>

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