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Enjoy a randomly generated fortune:

$ fortune | cowsay

 ______________________________________
/ All warranty and guarantee clauses   \
| become null and void upon payment of |
\ invoice.                             /
 --------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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