PAR is the best place to find Philadelphia divorce dockets prior to 1875. MLB is the best place to search for Philadelphia marriage records from 1 Oct 1885 to the present. Copies are available for a fee. It is important to realize that divorce information and parental permission documents can be found interfiled with marriage records. Always ask for these.
Indexes give date of filing, case number, plaintiff and defendant, and disposition of case.
Questions concerning the actual divorce records should be directed to the staff at the Court of Common Pleas. See the Guide to Genealogical Sources at the Pennsylvania State Archives . Many engagement and marriage clippings can be found here. The LDS collection is the largest collection of genealogical material in the world and is worldwide in scope. Numerous microfilm reels of church and public records are available for loan for a nominal fee.