Pennsylvania parents who pay child support and who are filing for bankruptcy cannot have their obligations discharged as part of the process. If a change in circumstances has made it impossible for them to keep up with child support payments, then they need to go to court and file a motion for modification of the child support order. However, this will not affect any amounts that are in arrears, which will still need to be paid.
Though very few people like to be told by a court that they will need to pay an ex-husband or -wife money every month, many people recognize that, in the case of child support, there is good reason for the order. Child support orders are not meant to punish a parent or to force interaction with his or her ex, but they are a way to defray some of the costs of raising a child. For the custodial parent, it can cost quite a bit to care for the former couple's child, so it only makes sense that the other parent also contribute.