Posted by jeffsnox@gmail.com on 07/14/06 13:00

Hi,

I have multiple checkboxes on the same form as follows:

<input type='checkbox' name='cbtype[]' value='1'>
<input type='checkbox' name='cbtype[]' value='2'>
<input type='checkbox' name='cbtype[]' value='3'>

I'm wanting to re-display the same checkboxes, but if the user
previously checked one of them then I want it automatically checked on
the subsequent display. At the moment I'm doing this:

$checked = '';
if (in_array('1',$HTTP_POST_VARS[cbtype])) { $checked = ' checked'; }
<input type='checkbox' name='cbtype[]' value='1' $checked>

This works perfectly unless the user hasn't selected any of the
checkboxes in which case I get the following error thrown at me:

Warning: in_array(): Wrong datatype for second argument in...

Obviously PHP isn't creating an array for the checkbox selection data
unless it has to, and so "in_array" is throwing a wobbly.

Presumably there's a better way to do this?

TIA

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