PHP Bitwise operators

The bitwise operator allows you to set the bits specified in the integer number. If both the left and right arguments are strings, the bitwise operator will manipulate the ASCII value of the character.

<?phpecho 12 ^ 9; The output is ' 5 ' echo ' 12 ' ^ ' 9 '; Output fallback characters (ASCII 8)                    //(' 1 ' (ASCII)) ^ (' 9 ' (ASCII)) = #8echo "Hallo" ^ "Hello",//output ASCII value #0 #4 #0 #0 #0 
     
      //' A ' ^ ' e ' = #4echo 2 ^ "3"; Output 1              //2 ^ ((int) "3") = = 1echo "2" ^ 3;//Output 1              //((int) "2") ^ 3 = = 1                            ?>
     

Bitwise operators

Example	name	Results
$a & $b	and (Bitwise AND)	A bit of 1 in both $a and $b will be set to 1.
$a | $b	or (bitwise OR)	The 1 bit in the $a or $b is set to 1.
$a ^ $b	XOR (Bitwise XOR)	The different bits in the $a and $b will be set to 1.
~ $a	Not (bitwise non)	Set the bit to 0 in the $a to 1, and vice versa.
$a << $b	Shift left	Moves the bits in the $a to the left $b times (each move represents "multiplied by 2").
$a >> $b	Shift Right (move to left)	Moves the bits in the $a to the right $b times (each move represents "divided by 2").

Warning

do not move more than 32 bits to the right on a 32-bit system . do not move left in cases where the result may be more than 32 bits .

http://bbs.dzwww.com/forum.php?mod=viewthread&tid=53319881

http://bbs.dzwww.com/forum.php?mod=viewthread&tid=53319915

http://bbs.dzwww.com/forum.php?mod=viewthread&tid=53319954

PHP Bitwise operators