1The following are examples of the results of running php_who.d. 2 3# php_who.d 4Tracing... Hit Ctrl-C to end. 5^C 6 PID UID FUNCS FILE 7 158525 80 7 /opt/coolstack/apache2/htdocs/php/func_abc.php 8 9Running the php_who.d while the func_abc.php program runs, we can see that 10while func_abc.php was running, it called seven functions. 11