twister2service.php

function check_if_twist_starts_with_special_char ($send_only_when_msg_starts_with_this_char, $text) {
    // Flag not set? Send it through
    if (empty($send_only_when_msg_starts_with_this_char)) return true;

    // Otherwise, only send if char mathes first of content
    if ($text[0] === $send_only_when_msg_starts_with_this_char) return true;

    // Still here, don't send it.
    return false;
}