Task

Verify that a file called     input.txt     and   a directory called     docs     exist.



This should be done twice:  

   once for the current working directory,   and
   once for a file and a directory in the filesystem root.


Optional criteria (May 2015):   verify it works with:

   zero-length files
   an unusual filename:     `Abdu'l-Bahá.txt  


if (file_exists('input.txt')) echo 'input.txt is here right by my side';
if (file_exists('docs'     )) echo 'docs is here with me';
if (file_exists('/input.txt')) echo 'input.txt is over there in the root dir';
if (file_exists('/docs'    )) echo 'docs is over there in the root dir';