WordPress Cron and Email Test

cron-test.php

<?php
/**
 * Plugin Name: Cron Test
 * Plugin URI: https://gist.github.com/A5hleyRich/6de1712ce5f46662c8ba
 * Description: WordPress cron and email test.
 * Author: Ashley Rich
 * Version: 1.0
 * Author URI: http://ashleyrich.com
 */

/**
 * Schedules
 *
 * @param array $schedules
 *
 * @return array
 */
function db_crontest_schedules( $schedules ) {
	$schedules['five_minutes'] = array(
		'interval' => 300,
		'display'  => 'Once Every 5 Minutes',
	);

	return $schedules;
}
add_filter( 'cron_schedules', 'db_crontest_schedules', 10, 1 );

/**
 * Activate
 */
function db_crontest_activate() {
	if ( ! wp_next_scheduled( 'db_crontest' ) ) {
		wp_schedule_event( time(), 'five_minutes', 'db_crontest' );
	}
}
register_activation_hook( __FILE__, 'db_crontest_activate' );

/**
 * Deactivate
 */
function db_crontest_deactivate() {
	wp_unschedule_event( wp_next_scheduled( 'db_crontest' ), 'db_crontest' );
}
register_deactivation_hook( __FILE__, 'db_crontest_deactivate' );

/**
 * Crontest
 */
function db_crontest() {
	wp_mail( get_option( 'admin_email' ), 'Cron Test', 'All good in the hood!' );
}
add_action( 'db_crontest', 'db_crontest' );