M Mr. Dubey 🎓 Coach ⭐ 102.92K Points 📊 PHP Q. Which PHP function checks if an array key exists? (A) isset() (B) array_key_exists() (C) key_exists() (D) has_key() 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) array_key_exists() Explanation: array_key_exists() checks key existence even if value is null.