Limit Time Slots to 30-Minute Intervals with a 15-Minute Gap using Gravity Forms

This solution demonstrates how to limit the time slots in the Gravity Forms Date Time field add-on to 30-minute intervals with a 15-minute gap after each slot. By dynamically generating the time slots within the specified range, you can create a more user-friendly time selection interface.

add_filter('gf_awp_calendar_allow_time', 'filter_gf_awp_calendar_allow_time', 10, 2);

function filter_gf_awp_calendar_allow_time($allow_time, $form) {
    $start_time = strtotime('09:00');
    $end_time = strtotime('17:00');

    $time_slots = array();
    while ($start_time < $end_time) {
        $time_slots[] = date('H:i', $start_time);
        $start_time += (30 * 60); // Add 30 minutes
        $start_time += (15 * 60); // Add 15 minutes gap
    }

    return $time_slots;
}

This code snippet will generate time slots from 9:00 AM to 5:00 PM with 30-minute intervals and a 15-minute gap after each slot, ensuring a more structured and convenient time selection experience for users.

Add this code in your child theme functions.php