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Enjoy a randomly generated fortune:

$ fortune | cowsay

 __________________________________________
/ 100 buckets of bits on the bus 100       \
| buckets of bits Take one down, short it  |
| to ground FF buckets of bits on the bus  |
|                                          |
| FF buckets of bits on the bus FF         |
| buckets of bits Take one down, short it  |
| to ground FE buckets of bits on the bus  |
|                                          |
\ ad infinitum...                          /
 ------------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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