How can I detect unchecked checkbox with php?

Question

There are 3(I do not know how many would be it changeable. 3 only example) checkboxes in my form and I want to detect unchecked checkboxes with php when it post. How can I d

Answer 1

You can do this check entirely in PHP with the following function:

function cbToBool($cb = true) {
    if (isset($cb)) {
        return true;
    } else {
        return false;
    }
}

using it like this

$_POST["blocked"] = cbToBool($_POST["blocked"]);