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.
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