Bitwise Operators
Bitwise operators allow you to turn specific bits within
an integer on or off. If both the left- and right-hand parameters
are strings, the bitwise operator will operate on the characters'
ASCII values.
<?php
echo 12 ^ 9; // Outputs '5'
echo "12" ^ "9"; // Outputs the Backspace
character (ascii 8)
// ('1' (ascii 49)) ^ ('9' (ascii 57)) = #8
echo "hallo" ^ "hello"; // Outputs
the ascii values #0 #4 #0 #0 #0
// 'a' ^ 'e' = #4
?>
Table 10-3. Bitwise Operators
Example Name Result
$a & $b And Bits that are set in both $a and $b are
set.
$a | $b Or Bits that are set in either $a or $b are set.
$a ^ $b Xor Bits that are set in $a or $b but not both are
set.
~ $a Not Bits that are set in $a are not set, and vice versa.
$a << $b Shift left Shift the bits of $a $b steps
to the left (each step means "multiply by two")
$a >> $b Shift right Shift the bits of $a $b steps
to the right (each step means "divide by two")
|
