How to pass an array of checked/unchecked checkbox values to PHP email generator?

Question

I have added a checkbox to a form that the user can dynamically add rows to. You can see the form here.

I use an array to pass the values for each row to a PHP emai

Answer 1

$mailing = array();
foreach($_POST as $v){
    $mailing[] = trim(stripslashes($v));
}

To handle unchecked boxes it would be better to set each checkbox with a unique value:

or

Then have a list of the checkboxes:

$boxes = array(1,2,3);
$mailing = array();
$p = array_key_exists('mailing',$_POST) ? $_POST['mailing'] : array();
foreach($boxes as $v){
    if(array_key_exists($v,$p)){
        $mailing[$v] = trim(stripslashes($p[$v]));
    }else{
        $mailing[$v] = 'No';
    }
}

print_r($mailing);

You could also use this with a number of checkboxes instead:

$boxes = 3;
$mailing = array();
$p = array_key_exists('mailing',$_POST) ? $_POST['mailing'] : array();
for($v = 0; $v < $boxes; $v++){
    if(array_key_exists($v,$p)){
        $mailing[$v] = trim(stripslashes($p[$v]));
    }else{
        $mailing[$v] = 'No';
    }
}

print_r($mailing);