References PDF Parser for PHP PDF Parser
JSON Parsing and Comments
Note: JSON can not have comments by specification. Though, there are some interpreters which allow use of comments. PHP functions to encode and decode JSON can be found here: http://www.php.net/manual/en/ref.json.php
XMPP
XMPP Ports XMPP – Extensible Messaging and Presence Protocol (Wikipedia) 5222 TCP XMPP client connection (RFC 3920) Official 5223 TCP XMPP client connection over SSL Unofficial 5269 TCP XMPP server connection (RFC 3920) Official 5298 TCP UDP XMPP JEP-0174: Link-Local Messaging
PDF with PHP
FPDF FPDF is a PHP class which allows to generate PDF files with pure PHP, that is to say without using the PDFlib library. Resources FPDF Homepage. http://fpdf.org/en/home.php Slovak Tutorial. http://pabi3.com/blog/php-tvorba-pdf-dokumentov-s-diakritikou/