!== Operator: It is called as non-identical operator. It returns true if operands are not equal, or they are not of the same type.
$x !== $y
Where $x and $y are the operands.
==! Operator: It is nothing but it can be further written as ==(!operand) which returns true or false depending on operands. Both the operators returns the boolean values either true or false.
$x ==! $y
Input: $x = true $y = false Operator: $x !== $y Output: true Operator: $x ==! $y Output: true
Example 1: This program uses both operands and returns the output.
Using !== operator bool(true) bool(false) bool(true) Using ==! operator bool(true) bool(false) bool(true)
Using !== operator bool(true) bool(true) bool(true) Using ==! operator bool(false) bool(false) bool(false)
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