How long do you have to get your property back after being evicted in philadelphia

Back from - ?

The Sheriff, the landlord, a storage facility?

Your sentence structure leaves things open, are you the owner or the one who was evicted?

I had time to check - here's the law:

"Order for Possession - If the landlord wins a judgment for possession, which means the tenant must move, the landlord can then enforce the judgment. This means that no sooner than fifteen (15) days after the District Justice makes his decision and enters the judgment for possession, the landlord can have the constable give the tenant an "Order for Possession". This Order for Possession is a notice telling the tenant that unless the tenant is out of the property by a date set on the notice (no sooner than fifteen (15) days after the date the tenant receives the notice) the Constable or Sheriff can forcibly set the tenant and his/her belongings out of the house or apartment. This is a total of at least thirty (30) days after the judgment for possession was entered.
If the Constable has to forcibly evict the tenant, and the tenant has not arranged for a place for his/her furniture and belongings, the Sheriff or Constable can store the furniture and belongings at a storage company at the tenant's expense. A tenant must pay any storage bill before getting his/her furniture and belongings back. If the tenant does not pay the storage bill or make arrangements regarding the furniture and belongings, they may be sold by the storage company to pay the storage bill."

http://www.rhol.com/csu/evictions/PA/PennsylvaniaSteps.htm

Normally they will merely set your property to the curb and it is gone. Normally if you don't pay the storage fee, after 60 days the storage facility will sell it for their costs.