R Rati Dubey 🎓 Tutor III ⭐ 8.55K Points 📊 PHP Q. Which function is used to check if a variable is set? (A) is_set() (B) isset() (C) var_exists() (D) has_value() 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) isset() Explanation: isset() checks if a variable is set and is not NULL.