How to get all uncheck checkboxes

Question

I know how to get all the check checkboxes by using this code

if ($_SERVER["REQUEST_METHOD"] == "POST"){
    if(!empty($_POST['arrsymbols'])){
       $checksymb = $_POST['arrsymbols'];
       foreach ($checksymb as  $selected){
           echo $selected;
       }
    }
}

but my problem is how to get all uncheck checkboxes in php. Thank you

Unchecked checkboxes are not send with the rest of the form data. So you can only go about it the other way around - compare the values that you do get (checked checkboxes) with a list of all checkboxes (like an array with the keys used.) — CBroe, May 09 '17 at 14:51

score 0 · Accepted Answer · answered May 09 '17 at 14:54

You would need an array of all checkbox names you have on your page and then you could loop through this array counting how many of the checkboxes are not a key in the array $_POST. Another solution would be to remove the names from the checkboxes and add them to hidden input which are updated by JS if the checkboxes change.
jQuery("input[type='checkbox']").change(function(){ jQuery(this).parent().find("input[type='hidden']").val(jQuery(this).prop("checked")); } This code assumes you have a container for each checkbox containing one checkbox and one hidden input.

How to get all uncheck checkboxes

1 Answers1