Does anyone know of a nice efficient way to convert an array of values
into a "mask"...
Here's the deal. Given an array such that:
$purchitem = 1;
$purchitem = 3;
$purchitem = 4;
I want to end up with a variable like this:
$mask = "10110";
Additionally, my theory is that then the person purchases another book
$purchitem = 2;
My new mask should be $purchmask = "01000";
Then I can load their previous mask from the database and boolean OR it
with the new mask to set the correct permissions. i.e.
$newmask = $mask | $purchmask;
Or ideally = "11110"
Can I boolean OR strings like that in the way I 'hope' it will work? Do
I need to convert it to an intermediate stage or cast it or anything?
Does this make sense? It's for an online book shopping cart. I have the
reverse working, where I can split the mask into what books. And I also
have the $purchitem working.
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