What are the visa & residency requirements in Pakistan?

"In order to visit Pakistan, foreign nationals must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, providing a valid passport, and paying the applicable visa fee. Depending on the purpose of the visit, additional documents may be required. In order to obtain residency in Pakistan, foreign nationals must apply for a residence permit. The process of applying for a residence permit involves submitting an application form, providing a valid passport, and providing proof of financial means. Depending on the purpose of the stay, additional documents may be required," said another expat in Pakistan.