php question regarding arrays

Posted by Martin on Stack Overflow See other posts from Stack Overflow or by Martin
Published on 2010-03-30T04:40:52Z Indexed on 2010/03/30 4:43 UTC
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Hi there,

I'm a (complete) php noob and need a little help with something.

I'm working on a project whereby a user can select up to 6 categories via a form (I'm using ExpressionEngine). The output is like this:

"Cat1","Cat2","Cat3"

...and so on. The user can select up to 6 categories on that form.

What I need: even if my result is 3 categories I need to have 6 'cells' - for want of a better word - even if they're empty:

"Cat1","Cat2","Cat3","","",""

I've tried this:

<?php
$str = '(output goes here)';
print_r(explode(',', $str, 6));
?>

...but the output give me:

Array
(
[0] => Cat1
[1] => Cat2
[2] => Cat3
[3] =>
[4] =>
[5] =>

)

How do I get from that to this:

"Cat1","Cat2","Cat3","","",""

Does this make sense?

Thanks Martin

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