PHILADELPHIA — The Philadelphia Police Department got 72 new officers Friday when its largest class of recruits in three years graduated from the academy, an infusion of personnel that comes amid a shortage of hundreds of officers. Police Commissioner Danielle Outlaw welcomed the graduates during a ceremony at Temple University, acknowledging that they’re joining the force as the city is simultaneously experiencing a staffing crisis and a surge in gun violence, saying: “It’s been a pretty difficult time to be a police officer.” “The narrative over the past few years surrounding police hasn’t a…