Every distinct wording since 2010, newest first.
August 25, 2017 · Commander 2017
Triggered abilities that trigger on attackers being declared may have different trigger conditions.
September 30, 2016 · Kaladesh
If a creature is put onto the battlefield attacking, its controller chooses which defending player or which planeswalker a defending player controls it’s attacking as it enters the battlefield (unless the effect that put it onto the battlefield specifies what it’s attacking). Such creatures are “attacking” but, for the purposes of trigger events and effects, they never “attacked.”
February 1, 2010 · Worldwake
Third, the active player gets priority. Players may cast spells and activate abilities.