1053  ??  Ss     0:45.47 /usr/local/sbin/nrpe2 -d -c /usr/local/etc/nrpe.cfg
1085  ??  Is     0:00.03 /bin/sh /usr/local/bin/mysqld_safe --defaults-extra-file=/var/db/mysql/my.cnf --user=mysql --datadir=/var/db/mysql --pid-file=/var/db/mysql/MYNAME.pid

exec('ps ax', $o);
print_r($o);

[27] =>  1053  ??  Ss     0:45.48 /usr/local/sbin/nrpe2 -d -c /usr/local/etc/nrpe.cfg
[28] =>  1085  ??  Is     0:00.03 /bin/sh /usr/local/bin/mysqld_safe --defaults-extra-f