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Enjoy a randomly generated fortune:

$ fortune | cowsay

 ________________________________________
/ UNIX is very simple, it just needs a   \
| genius to understand its simplicity.   |
|                                        |
| -- Dennis Ritchie (1941-2011), creator |
| of the C programming language and of   |
|                                        |
\ UNIX                                   /
 ----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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