How to determine if a PHP file is loaded via cron/command line

Question

I need to determine whether the PHP file is being loaded via cron or command line within the code. How can I do this?

Answer 1

This is one simple way. Certain elements of the $_SERVER array are only set if called from HTTP. Thus you can:

if(!isset($_SERVER['REQUEST_METHOD'])){
 // from cron or command line
}else{
 // from HTTP
}

Others include: $_SERVER['HTTP_HOST']