Question

I’ve got a for that (among other things) has an input field:

<input type="text" id="NumAthletes_Ratings" name="NumAthletes_Ratings" /> 

In my PHP code, I’d like to check if the user has entered no value or a 0. However, this code

    if (isset($_POST['NumAthletes_Ratings'])) {
        if ($_POST['NumAthletes_Ratings'] > 0) {
            echo 'POST Parameter is set to ' . $_POST['NumAthletes_Ratings'];
        } else {
            echo 'POST Parameter is set to Zero';
        }
    } else {
        echo 'POST Parameter is not set';
    }

prints POST Parameter is set to Zero regardless of an empty value or 0 being passed. How can I differentiate between those cases?

Answer 1

You could check for the string "0" (all $_POST variables are strings or arrays of strings):

if ($_POST['NumAthletes_Ratings'] > 0) {
        echo 'POST Parameter is set to ' . $_POST['NumAthletes_Ratings'];
    } elseif ($_POST['NumAthletes_Ratings'] === '0') {
        echo 'POST Parameter is set to 0';
    } else {
        echo 'POST Parameter is empty';
    }