R Roshan 🎓 Extraordinary ⭐ 2.52K Points 📊 PHP Q. What will be the output? Code: $a = [1,2,3]; array_walk($a, function(&$v) { $v *= 2; }); print_r($a); (A) [1,2,3] (B) [2,4,6] (C) [1,4,9] (D) Error 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) [2,4,6] Explanation: Values modified using reference in callback.