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Enjoy a randomly generated fortune:

$ fortune | cowsay

 ___________________________________
/ Fertility is hereditary. If your  \
| parents didn't have any children, |
\ neither will you.                 /
 -----------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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