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Enjoy a randomly generated fortune:

$ fortune | cowsay

 ______________________________________
/ ... but hey, this is Linux, isn't it \
| meant to do infinite loops in 5      |
| seconds?                             |
|                                      |
| -- Jonathan Oxer in the apt-cacher   |
\ ChangeLog                            /
 --------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

$output = shell_exec("/usr/games/fortune | /usr/games/cowsay");
echo $output;