Get name of unchecked chekboxes

[alirezaok]

as you know from form elements sends checked checkboxes in the post/get data; unchecked elements are not transmitted. but other elemets (like textbox, textarea , ...) sends elements name even if this elements are empty.

for exmaple, this code get all names of elements and their values even if the value was empty but about cheboxes, get only chekboxes were checked. i need name of all chexboxes (cheked and unchecked).

what is your solution?

foreach ($_POST as $key => $value)
    {

echo $key.$value."<br>";
}

[bradgrafelman]

If you keep an array of field names of all of the checkboxes in the form, you can use [man]array_diff/man to figure out which fields weren't POST'ed. Simple example:

$fields = array("checkbox1", "checkbox2", "checkbox3", "checkbox4");

// simulate POST'ed data
$_POST = array('checkbox1' => 'foo', 'username' => 'brad', 'checkbox4' => 'bar');

$missing_fields = array_diff($fields, array_keys($_POST));
print_r($missing_fields);

output of the above code:

Array
(
    [1] => checkbox2
    [2] => checkbox3
)