R Rati Dubey 🎓 Tutor III ⭐ 8.55K Points 📊 PHP Q. What is the use of the isset() function in PHP? (A) Check if variable is empty (B) Check if variable exists and is not null (C) Set a variable (D) Unset a variable 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) Check if variable exists and is not null Explanation: isset() checks if a variable is set and not null.