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Enjoy a randomly generated fortune:

$ fortune | cowsay

 _________________________________________
/ === ALL USERS PLEASE NOTE               \
| ========================                |
|                                         |
| There has been some confusion           |
| concerning MAPCAR.                      |
|                                         |
| (DEFUN MAPCAR (&FUNCTIONAL FCN &EVAL    |
| &REST LISTS)                            |
|                                         |
| (PROG (V P LP)                          |
|                                         |
| (SETQ P (LOCF V))                       |
|                                         |
| L (SETQ LP LISTS)                       |
|                                         |
| (%START-FUNCTION-CALL FCN T (LENGTH     |
| LISTS) NIL)                             |
|                                         |
| L1 (OR LP (GO L2))                      |
|                                         |
| (AND (NULL (CAR LP)) (RETURN V))        |
|                                         |
| (%PUSH (CAAR LP))                       |
|                                         |
| (RPLACA LP (CDAR LP))                   |
|                                         |
| (SETQ LP (CDR LP))                      |
|                                         |
| (GO L1)                                 |
|                                         |
| L2 (%FINISH-FUNCTION-CALL FCN T (LENGTH |
| LISTS) NIL)                             |
|                                         |
| (SETQ LP (%POP))                        |
|                                         |
| (RPLACD P (SETQ P (NCONS LP)))          |
|                                         |
| (GO L))) We hope this clears up the     |
\ many questions we've had about it.      /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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