The hero NYPD cop who was gunned down during a traffic stop has been posthumously promoted to detective, police brass said Saturday.

Officer Jonathan Diller, 31, who was killed Monday during a routine traffic stop in Queens, received the promotion at his funeral service at Saint Rose of Lima Church in Massapequa, where NYPD Commissioner Edward Caban honored the fallen cop.

Diller’s new badge number is 110, Caban said, in a nod to the birthday of his young son, Ryan, who stood his near his mother on the altar during the service.

“My husband died a hero, but he also lived as one,” Diller’s widow, Stephanie, said.