Another ShortestWikiContest contender, heavily influenced by SigWik. Written to prove that also PHP can be as short and unreadable as Perl.
289 chars of PHP and Shell on 4 lines.
Features
<?$p=$_SERVER[PHP_SELF];$e=htmlentities($_GET[t]);if($e)`echo "$e">.$p` &header("Location:$p");$n=`cat .$p`;echo preg_replace('~htt\S+|([A-Z]\w+){2,}~' ,'<a href=$0>$0</a>',`ls -t|head`."<hr><h1>$p</h1><pre>$n"),"<form action=.$p> <input type=submit>\n<textarea name=t cols=80 rows=16>$n";Command to start the PHP built-in webserver
$ php -d error_reporting=0 -d short_open_tag=On -S localhost:8000 wiphiki.phpLicense
WiPhiki is licensed under the terms and conditions of the MIT License - http://opensource.org/licenses/mit-license
The author of the original WiPhiki code is Smasty (http://smasty.net).