Bit operations in php

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$a & $b	And (bitwise AND)	will set the bits in and that are both 1 to 1.
$a | $b	Or (bitwise OR)	will combine and Any bit that is 1 is set to 1.
$a ^ $b	Xor (bitwise XOR)	will combine The bit where one is 1 and the other is 0 is set to 1.
~ $a	Not (bitwise negation)	will be 0 in Bit is set to 1 and vice versa.
$a << $b	Shift left	The bits in are shifted to the left times (each shift means "multiply by 2").
$a >> $b	Shift right	The bits in are shifted to the right times (each shift means "divide by 2").

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