Create a new file in the formats/ folder (see Folder structure).

The file must be named according to following specification:

  • It starts with the type
  • The file name must end with ‘Format’
  • The file type must be PHP, written in small letters (seriously!) “.php”


Type Filename
Atom AtomFormat.php
Html HtmlFormat.php

The file must start with the PHP tags and end with an empty line. The closing tag ?> is omitted.


    // PHP code here
// This line is empty (just imagine it!)