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Enjoy a randomly generated fortune:

$ fortune | cowsay

 _________________________________________
/ === This letter is the Honor System     \
| Virus ==== If you are running a         |
| Macintosh, OS/2, Unix, or Linux         |
| computer, please randomly delete        |
| several files from your hard disk drive |
| and forward this message to everyone    |
| you know.                               |
| ======================================= |
\ =======                                 /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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