Understanding and application

What is the role of يُرَائِي in مَنْ صَلَّى يُرَائِي?

Sincerity, Following the Sunnah, Human Rights, and Understanding Religion (Hadith 199–205)

• It is a synonym of مَنْ
• It describes the accompanying ostentatious state or motive
• It names charity
• It only denotes the past tense