"WordPress Cron Example Plugin"

This is WordPress Example Plugin to Write Cron Job Plugin

You can create custom intervals

// add custom interval

function cron_add_minute( $schedules ) { // Adds once every minute to the existing schedules. $schedules['everyminute'] = array( 'interval' => 60, 'display' => __( 'Once Every Minute' ) ); return $schedules; }

add_filter( 'cron_schedules', 'cron_add_minute' );

Create a scheduled event (if it does not exist already)

// create a scheduled event (if it does not exist already)

function cronstarter_activation() { if( !wp_next_scheduled( 'mycronjob' ) ) {
wp_schedule_event( time(), 'everyminute', 'mycronjob' );
} }

// and make sure it's called whenever WordPress loads add_action('wp', 'cronstarter_activation');