Every distinct wording since 2010, newest first.
April 14, 2023 · March of the Machine
An ability that reads “Whenever [a player] attacks [another player], . . .” triggers if one or more creatures the first player controls are declared as attackers attacking the second player. It won’t trigger if a creature is put onto the battlefield attacking or if a creature attacks a planeswalker or a battle.
February 18, 2022 · Kamigawa: Neon Dynasty
An ability that reads “Whenever [a player] attacks [another player], . . .” triggers if one or more creatures the first player controls are declared as attackers attacking the second player. It won’t trigger if a creature is put onto the battlefield attacking or if a creature attacks a planeswalker.