Re: checkbox unchecked

I did once, if I remember once, this "strategy": <input type="hidden" name="R_a" value="n"> <input type="checkbox" name="R_a" value="y" <?php echo $checked ?>> If checked, you will have value "y". Though, if unchecked, or it was checked and visitor unchecked, the value should be "n". ;) -afan Ronald Wiplinger wrote:

I have now tried to add many of the security hints on a web page and come to a problem. I am checking if the allowed fields match the sent fields. From the database I get the information if a checkbox is checked or not: <?php if($DB_a =="y") {

    $checked="checked";
    } else {
    $checked="";
    }

?> <input type="checkbox" name="R_a" value="y" <?php echo $checked ?> If the user takes out the checkmark the value will become "" and the field will not submitted which results in a missing field. $allowed = array(); $allowed[]='form'; $allowed[]='R_a'; $allowed[]='R_b'; .... $sent = $array_keys($_POST); if($allowed == $sent) { ... do some checking ... } else {

        echo "Expected input fields do not match!";
    }
        break;

How can I force a "n" for not checked in the input field? or how can I solve that? bye Ronald