How to detect that a cron job is currently running in WordPress

Posted June 22, 2015 • Last Updated • Get free updates of new posts here

You can detect if the cron is running using DOING_CRON:

if ( defined( 'DOING_CRON' ) and DOING_CRON ) {
    // ... code to be run when a cron is in progress ...
}

This way you can set certain filters/hooks only during a CRON and is_admin(), for instance.