Created example using the SPL Doubly Linked List

Author: Alienpruts

chap-03/SplDoublyLinkedList.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: bert
+ * Date: 3/10/18
+ * Time: 13:53
+ */
+
+$bookTitles = new SplDoublyLinkedList();
+
+$bookTitles->push("Introduction to Algorithms");
+$bookTitles->push("Introduction to PHP and Data Structures");
+$bookTitles->push("Programming Intelligence");
+
+$bookTitles->add(1, "Introduction to Calculus");
+$bookTitles->add(3, "Introduction to Graph Theory");
+
+for ($bookTitles->rewind(); $bookTitles->valid(); $bookTitles->next()){
+    echo $bookTitles->current() . PHP_EOL;
+}