Bitwise operators and check if an bit is NOT within the flag.

[Mathijs <m.v.veluw@xxxxxxxxxx>]

Hello there.

I am working with some bitwise Operators for validating some variables.
Now i need to know if an certain bit is NOT set and an other bit IS set.

Example.

<?php

const VALIDATE_CHECK1 = 1;
const VALIDATE_CHECK2 = 2;
const VALIDATE_CHECK3 = 4;
const VALIDATE_ALL    = 7;

//--Example 1 - This works nice.
$flag1 = self::VALIDATE_CHECK1;

//Do if VALIDATE_CHECK1 is set
if ($flag1 & self::VALIDATE_CHECK1) {
    print 'Validate 1';
}
//Do if VALIDATE_CHECK2 is set
if ($flag1 & self::VALIDATE_CHECK2) {
    print 'Validate 2';
}

//--Example 2 - I want to check if VALIDATE_CHECK3 is not set and then continue.
$flag2 = self::VALIDATE_ALL;

//Do if VALIDATE_CHECK1 is set BUT NOT when VALIDATE_CHECK3 is set.
if ($flag2 & self::VALIDATE_CHECK1 && $flag2 & ~self::VALIDATE_CHECK3) {
    print 'Only Validate 1';
}
//etc...
?>

This last example i can't seem to get to work.
I Want to only do that when for example VALIDATE_CHECK3 is not within the $flag2.
How can i do this?

Thx in advanced.

--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php