What is the expression method of equal and not equal in php?

Comparison operator in php

$a == $b is equal to TRUE if $a Equal to $b.
$a === $b Congruent TRUE if $a is equal to $b and their types are also the same. (Introduced in PHP 4)
$a != $b is not equal to TRUE if $a is not equal to $b.
$a <> $b is not equal to TRUE if $a is not equal to $b.
$a !== $b is not congruent TRUE if $a is not equal to $b, or their types are different. (Introduced in PHP 4)
$a < $b is less than TRUE if $a is strictly less than $b.
$a > $b is greater than TRUE if $a is strictly $b.
$a <= $b is less than or equal to TRUE if $a is less than or equal to $b.
$a >= $b is greater than or equal to TRUE, if $a is greater than or equal to $b.

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