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Enjoy a randomly generated fortune:


$ fortune | cowsay

 _________________________________________
/ As part of an ongoing effort to keep    \
| you, the Fortune reader, abreast of the |
| valuable information that daily crosses |
| the USENET, Fortune presents:           |
|                                         |
| News articles that answer *your*        |
| questions, #1:                          |
|                                         |
| Newsgroups: comp.sources.d              |
|                                         |
| Subject: how do I run C code received   |
| from sources                            |
|                                         |
| Keywords: C sources                     |
|                                         |
| Distribution: na                        |
|                                         |
| I do not know how to run the C programs |
| that are posted in the                  |
|                                         |
| sources newsgroup. I save the files,    |
| edit them to remove the                 |
|                                         |
| headers, and change the mode so that    |
| they are executable, but I              |
|                                         |
| cannot get them to run. (I have never   |
| written a C program before.)            |
|                                         |
| Must they be compiled? With what        |
| compiler? How do I do this? If          |
|                                         |
| I compile them, is an object code file  |
| generated or must I generate            |
|                                         |
| it explicitly with the > character? Is  |
| there something else that               |
|                                         |
\ must be done?                           /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||


Here is the PHP code:
$output = shell_exec("/usr/games/fortune | /usr/games/cowsay");
echo $output;