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Enjoy a randomly generated fortune:

$ fortune | cowsay

 _________________________________________
/ === ALL USERS PLEASE NOTE               \
| ========================                |
|                                         |
| CAR and CDR now return extra values.    |
|                                         |
| The function CAR now returns two        |
| values. Since it has to go to the       |
| trouble to figure out if the object is  |
| carcdr-able anyway, we figured you      |
| might as well get both halves at once.  |
| For example, the following code shows   |
| how to destructure a cons (SOME-CONS)   |
| into its two slots (THE-CAR and         |
| THE-CDR):                               |
|                                         |
| (MULTIPLE-VALUE-BIND (THE-CAR THE-CDR)  |
| (CAR SOME-CONS) ...)                    |
|                                         |
| For symmetry with CAR, CDR returns a    |
| second value which is the CAR of the    |
| object. In a related change, the        |
| functions MAKE-ARRAY and CONS have been |
| fixed so they don't allocate any        |
| storage except on the stack. This       |
| should hopefully help people who don't  |
| like using the garbage collector        |
| because it cold boots the machine so    |
\ often.                                  /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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