PHP Operators

Name	Syntax	Result
and	$a and $b	TRUE if both $a and $b are TRUE.
and	$a && $b	TRUE if both $a and $b are TRUE.
or	$a OR $b	TRUE if either $a or $b is TRUE.
or	$a || $b	TRUE if either $a or $b is TRUE.
xor	$a XOR $b	TRUE if either $a or $b is TRUE, but not both
not	! $a	TRUE if $a is not TRUE.

Name	Syntax	Result
less than	$a < $b	TRUE if $a is strictly less than $b.
greater than	$a > $b	TRUE if $a is strictly greater than $b.
Lesser than or equal to	$a <= $b	TRUE if $a is greater than or equal to $b.
Greater than or equal to	$a >= $b	TRUE if $a is greater than or equal to $b.
equal	$a == $b	TRUE if $a is equal to $b after type juggling.
identical	$a === $b	TRUE if $a is equal to $b, and they are of the same type.
not equal	$a != $b	TRUE if $a is not equal to $b after type juggling.
not equal	$a <> $b	TRUE if $a is not equal to $b after type juggling.
Spaceship Operator	$a <=> $b	An integer less than, equal to, or greater than zero when $a is respectively less than, equal to, or greater than $b. Available as of PHP 7.
Null Coalesce Operator	$a ?? $b ?? $c	Returns the first operand from left to right that exists and not NULL. If nothing exists will return NULL. Available as of PHP 7.