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PHP Not Equal


!= and <> are the Not Equal signs of PHP:
<?PHP
$a = 3;
if ($a != 4) {...}  //True
if ($a <> 4) {...}  //True
?>

!== is the Not Identical signs of PHP:
<?PHP
$a = 3;
if ($a == "3") {...}  //True
if ($a === "3") {...}  //False
?>