Marco's Extended Debug
It extends the basic functionality by adding other information such as the dump of GPC variables (GET, POST, cookies), the dump of the session variable, but, above all, adds the ability to limit sending debug information to specific IPs or networks, so you can use it on production machines.
* Can limit output to single IPs like 192.168.10.2 or entire networks like 192.168.1.0/24 or combine values
* Dumps requests in $_POST, $_GET, $_COOKIES
* Dumps VALUES in $_SESSIONS
* Dumps remote client info (IP, referres, method)
* Add specific css classes and IDs for better reading (add also css file)
Note:
It's a developers' plugin.
== HISTORY
* Version 2.5.0 (Sep 25th, 2013) release Joomla! 2.5
* Version 1.5.1 (Sep 5th, 2010) first release Joomla! 1.5