So they said the Phils 4 homerun inning was the first since 1985. Trying to see who did that and got this article:
https://www.mlb.com/news/phillies-5-homer-inning
The closest the Phillies have come was four in the seventh inning at Wrigley Field on Aug. 17, 1985 (Juan Samuel, Glenn Wilson, Mike Schmidt and Darren Daulton).
July 26, 1987, Braves @ Phillies, 8th inning, Milt Thompson, Von Hayes and Mike Schmidt hit back-to-back-to-back HR's and the fourth guy, Chris James, hit a fly ball that was caught at the back of the warning track. Saw it on TV when it happened.