The Phillipians showed their solidarity with Paul while in prison by
Answer Details
The Philippians showed their solidarity with Paul while in prison by sending gifts to him through Epaphroditus. This is evidenced in Philippians 4:18 where Paul thanks them for the gifts they sent him, saying "I have received full payment and have more than enough. I am amply supplied, now that I have received from Epaphroditus the gifts you sent." The gifts were not just a material provision but also a show of support and encouragement from the Philippian church to Paul during his difficult time in prison.