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I've got this annoying problem, of how do you go about when a user deslects a checkbox, and then update the DB accordingly.
What I am trying to achieve is when a user selects a checkbox it places a 1 in the DB, if it deselects it then it place a 0 in the DB
if ($submit == 'Edit')
// obviously I need to write some code here so that a user a deselect the checkbox
<form method="post" action=show.php>
<input type=checkbox name=live value=1>
<input type="hidden" name=user_num value=<? echo $user_num?>>
<input type="submit" name="submit" value="Edit">
No value is passed when a checkbox is not selected. When it is selected you either get "on" (if no value is set) or the value assigned to the checkbox.
The only way to record both positive and negative input from checkboxes is to loop through the array of possible inputs and note which appear in the $_GET or $_POST array.
I suggest something like:
$box1checked = ($box1checked == "on") ? 1 : 0;