No police officer shall ask, demand or receive any compensation or reward for the police officer's services other than compensation provided by ordinance, except rewards offered for the arrest of persons accused of crimes committed outside of the city in which the police officer is employed. A police officer violating any of the provisions of this section commits a misdemeanor of the third degree and shall, upon conviction, be sentenced to pay a fine or imprisonment, or both, to be followed by dismissal from office.