Checkbox with bitwise operator?

[Anon]

hi there,

I am trying to use bitwise operator in implementing checkbox (multiple selection) in a form, here is the code below in the form:

<tr><td>Intended purpose of Car :</td><td><input type=checkbox name=object[pros_buypurpose][] value=1 ".(($object['pros_buypurpose']&1)?'checked':'').">Personal use<br>
<input type=checkbox name=object[pros_buypurpose][] value=2 ".(($object['pros_buypurpose']&2)?'checked':'').">Family use<br>
<input type=checkbox name=object[pros_buypurpose][] value=3 ".(($object['pros_buypurpose']&3)?'checked':'').">Business<br></td></tr>

in the submit portion, i check it like this:

$buy_purpose = 0;
for ($i=0; $i<count($object['pros_buypurpose']); $i++) {
$buy_purpose = $buy_purpose | $object['pros_buypurpose'][$i];
}
unset($object['pros_buypurpose']);
$object['pros_buypurpose'] = $buy_purpose;

.........

while (list($key, $val) = each($object)) {
.....

}

After i insert to the database, and check back the value (selection of that checkbox), it turn out to be different from the one that i checked for the first time. Any ideas?

Thanks in-advanced!

[[deleted]]

In your loop, use a print statement and check what's in

$object['pros_buypurpose'][$i]