How and where was St. Philip martyred?

Answer 1

If you are asking about Saint Philip the Apostle, there are legends that he was crucified upside down, there are other legends that he was beheaded in the city of Hierapolis. Bottom line? We don't know for sure.
According to tradition he preached in Greece and was crucified upside down at Hierapolis under Emperor Domitian.

Answer 2

The only apostle's death that is recorded in scripture is that of Saint James the Greater who was killed by the sword of Herod (Acts 12:2). Legends surround the deaths of the other apostles and Philip is said by one source to have been crucified and another source says he was beheaded. According to tradition he had converted the wife of the Roman proconsul to Christianity and that did not set well with her husband who had Philip executed.

Answer 3

We do not know how any of the apostles died, nor whether or why Philip was martyred. A Christian tradition, based on a late appendix added to the fourth-century, non-canonical Acts of Philip, says that Philip was crucified upside down because he converted the wife of the proconsul of Hierapolis.

One could hardly trust an amendment to a document written some four hundred years after the supposed event and never accepted as reliable by the Church, yet this report is the basis for some modern Christian traditions about the martyrdom of Philip. Otherwise, we do not know how or why Philip died.

Answer 4

Philip was martyred about the year 80 at Hierapolis, Phrygia. Some say he was beheaded and others say he was crucified.