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Enjoy a randomly generated fortune:

$ fortune | cowsay

 _________________________________________
/ Proposed Additions to the PDP-11        \
| Instruction Set:                        |
|                                         |
| DC Divide and Conquer DMPK Destroy      |
| Memory Protect Key DO Divide and        |
| Overflow EMPC Emulate Pocket Calculator |
| EPI Execute Programmer Immediately EROS |
| Erase Read Only Storage EXCE Execute    |
| Customer Engineer HCF Halt and Catch    |
| Fire IBP Insert Bug and Proceed INSQSW  |
| Insert into queue somewhere (for FINO   |
| queues [First in never out]) PBC Print  |
\ and Break Chain PDSK Punch Disk         /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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