M Mr. Dubey 🎓 Coach ⭐ 103.11K Points 📊 PHP Q. Which of the following is used to check if a variable is set? (A) isset() (B) defined() (C) check() (D) set() 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (A) isset() Explanation: isset() checks whether a variable is set and is not null.