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Enjoy a randomly generated fortune:

$ fortune | cowsay

 _________________________________________
/ A statistician, who refused to fly      \
| after reading of the alarmingly high    |
| probability that there will be a bomb   |
| on any given plane, realized that the   |
| probability of there being two bombs on |
| any given flight is very low. Now,      |
| whenever he flies, he carries a bomb    |
\ with him.                               /
 -----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

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