<html> <head> <title>Stack</title> </head> <body> <?php $stack = array(); $book_one = "One"; $book_two = "Two"; $book_three = "Three"; array_push($stack, $book_one); array_push($stack, $book_three); array_push($stack, $book_two); $n = count ($stack); while ($book = array_pop ($stack)) { print ("Item $n: $book<br />\n"); $n--; } ?> </body> </html>