PHP provides three logical operators when we test more than one condition to make decisions. These are: && (meaning logical AND), || (meaning logical OR) and ! (meaning logical NOT).

Operator Description
&& And operator performs logical conjunction on two expressions
(if both expressions evaluate to True, result is True. If either expression evaluates to False, the result is False)
|| Or operator performs a logical disjunction on two expressions
(if either or both expressions evaluate to True, the result is True).
! Not operator performs logical negation on an expression.

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