To say “Alhamdulillah for everything” in Arabic, you can say:
الحمد لله على كل شيء
Transliteration: Alhamdulillah ‘ala kulli shay.
This phrase is a way of expressing gratitude to Allah (God) for everything in one’s life, acknowledging that all blessings and circumstances come from Him. “Alhamdulillah” means “Praise be to Allah,” and “kulli shay” means “everything” or “all things.” It’s a common expression of thankfulness in Islamic culture.