53 Pa. Stat. § 25271
No person or persons shall be employed, engaged or concerned in the business or employment of hawking, peddling or selling produce or merchandise, or either or any of them, within the limits of any city of the second and third classes within this commonwealth, without having previously taken out a license; and if any person or persons shall go from house to house within the limits of such cities to sell or offer or expose for sale such articles or any of them, without having paid such sum or sums as may be fixed by ordinance of councils of such cities into the treasury thereof, and received a license therefor, the person or persons so offending shall forfeit and pay, for each and every offense, the sum of fifty dollars, to be recovered summarily before the mayor of such city wherein the offense shall have been committed: Provided however, That nothing herein contained shall be construed so as to prohibit farmers, gardeners or dairymen from selling the products of their own farms, gardens or dairies.
53 P.S. § 25271