joomla/joomla-cms — pull request #2489 by avjoomla (2013-11-11 07:17:30+00:00)
Title: Update input.php

The original code
$attrSubSet[0] = array_pop(explode(' ', trim($attrSubSet[0])));
throws an Strict standards: Only variables should be passed by reference
In array_pop the only parameter is an array passed by reference. The return value does not have any reference.