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Tutorials » Php »
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Topic |
What are the Bitwise Operators?
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Explanation |
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Bitwise operators are used to turn specific bits within an integer on or off.
Example
<?php
echo 12
9 ; // Outputs '5'
echo 2
"3"; // Outputs 1
echo 2
"3"; // Outputs 1
?>
In the above example the binary for 12 is 1100, for 9 is 1001, when XOR operator is used it will give a value of
101 which is 5 in decimal numbers.
If both the left and right parameters are strings, it will display ASCII characters
Following are the bitwise operators available
| 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") |
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A Note |
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