From 6.2 to 6.3

Contents

Deprecated APIs
Deprectated classes
Deprecated class functions

Deprecated APIs 

elgg_dump() use elgg_log()
notify_user() use elgg_notify_user() or \ElggUser::notify()

Deprectated classes 

using \ElggObject directly has been deprecated. Use your own extension of an ElggObject for your subtype.

Deprecated class functions 

\Elgg\Logger::dump() use \Elgg\Logger::error()