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Enjoy a randomly generated fortune:

$ fortune | cowsay

 ___________________________________
/ WHERE CAN THE MATTER BE           \
|                                   |
| Oh, dear, where can the matter be |
|                                   |
| When it's converted to energy?    |
|                                   |
| There is a slight loss of parity. |
|                                   |
\ Johnny's so long at the fair.     /
 -----------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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