That's the EASY part John! The hard part is converting the array (which was a checkbox array from a form submission) into the binary string (as per the original post)
> Here's the deal. Given an array such that: > $purchitem[0] = 1; //purchased book #1 checkbox enabled > $purchitem[1] = 3; //purchased book #3 checkbox enabled > $purchitem[2] = 4; //purchased book #4 checkbox enabled > I want to end up with a variable like this: > $mask = "10110"; Get it now? ;-) > -----Original Message----- > From: John W. Holmes [mailto:holmes072000@;charter.net] > Sent: Wednesday, November 06, 2002 4:19 AM > To: 'Jon Haworth'; [EMAIL PROTECTED] > Subject: RE: [PHP] How do I convert an array into a mask? > > > > Hi John, > > > > > > So given the example below, "10110" > > > > means that the person can view books 1, 3, and 4, > > > > but not 2 or 5. dig? > > > > > > Explain that to me... I know binary, but I can't see > > > how that equates to 1, 3, and 4. > > > > Because you know binary :-) > > > > The above is a series of yes/no flags, not a binary number. Reading > from > > left to right: > > > > book 1 : yes > > book 2 : no > > book 3 : yes > > book 4 : yes > > book 5 : no > > > > Cheers > > Jon > > Ok, so knowing binary and now knowing that, :) > > Couldn't you just treat the number as a string and tear it > apart to see what permissions the user has? > > <? > > $var = "10110"; > > $l = strlen($var); > > for($x=0;$x<$l;$x++) > { > if($var{$x}) > { echo "Permission for book $x is good<br>\n"; } > else > { echo "Permission for book $x is bad<br>\n"; } > } > > ?> -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
