Slip 22
1 <?php $queue = array(); while (true) { echo "\n====== Queue Operations ======\n"; echo "1. Insert an element in Queue\n"; echo "2. Delete an element from Queue\n"; echo "3. Display Queue\n"; echo "4. Exit\n"; echo "Enter your choice: "; $choice = trim(fgets(STDIN)); switch ($choice) { case 1: echo "Enter element to insert: "; $element = trim(fgets(STDIN)); array_push($queue, $element); echo "Inserted: $element\n"; break; case 2: if (empty($queue)) { echo "Queue is empty. Cannot delete.\n"; ...