Thanks Dave, finally got it. I'm gonna do some tests to see it working today and never forget it.
I got puzzled with the "&=" thing. Thanks again, CarlosAB On 5/7/10, DaveG <[email protected]> wrote: > > > On 5/7/2010 12:32 PM, Carlos AB wrote: >> I've read the php manual about bitwise operators but couldn't >> understand the code below: >> >> $EnablePost&= preg_grep('/^post/', array_keys(@$_POST)); > Interesting question. I had to research, but here's how I'd interpret it. > > From [1]: &= is bitwise 'and': A &= B is the same as (A = A & B) > > 1] &= will perform a bitwise AND operation on the result of the the > preg_grep, and the value of $EnablePost. > 2] The preg_grep will return an array of the result of a search of the > keys of the array $_POST for anything starting with the text 'post' > > So, the bitwise operator will scan each element of the array returned by > $_POST, and do an 'and' with $EnablePost. So: > > Initial value of$EnablePost: 0/unset 1 1 > 'post' found in array: 1 1 0 > Result: 0 1 0 > > So, if $EnablePost is already set, and 'post' is in the $_POST array, > then keep it set, otherwise disable posting. > > > ~ ~ Dave > > [1]http://php.comsci.us/etymology/operator/assignment.php > [2]http://php.comsci.us/etymology/operator/bitwiseand.php > _______________________________________________ pmwiki-users mailing list [email protected] http://www.pmichaud.com/mailman/listinfo/pmwiki-users
