EventLevels.php

<?php
    /**
     * Event call is of very low importance and should be ran first, to allow
     * other plugins to further customise the outcome
     */
    const LOWEST = 5;
    /**
     * Event call is of low importance
     */
    const LOW = 4;
    /**
     * Event call is neither important or unimportant, and may be ran normally
     */
    const NORMAL = 3;
    /**
     * Event call is of high importance
     */
    const HIGH = 2;
    /**
     * Event call is critical and must have the final say in what happens
     * to the event
     */
    const HIGHEST = 1;
    /**
     * Event is listened to purely for monitoring the outcome of an event.
     *
     * No modifications to the event should be made under this priority
     */
    const MONITOR = 0;