How to differentiate between http and cli requests?

Question

The title is quiet straightforward. I have to know on server side if the script called through HTTP request or by command line. I could examine the $_SERVER['argv'] or $_SERVER['argc'].
What is the pragmatic way to do that?

Answer 1

http://us3.php.net/manual/en/function.php-sapi-name.php

<?php
echo PHP_SAPI;
echo php_sapi_name();
?>