added abstract factory and factory pattern

AbstractFactory/AbstractFactory.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace DesignPatterns;
+
+/**
+ * Abstract Factory pattern
+ *
+ * Purpose:
+ * to create series of related or dependant objects without specifying their concrete classes,
+ * usually created classes would all implement the same interface
+ *
+ * Examples:
+ * - A Factory to create media in a CMS: classes would be text, audio, video, picture
+ * - SQL Factory (types are all strings with SQL, but they vary in detail (tables, fields, etc.))
+ * - Zend Framework: Zend_Form::createElement() creates form elements, but you could also call new TextElement() or so
+ *
+ */
+abstract class AbstractFactory
+{
+    /**
+     * @static
+     * @param string $content
+     * @return AbstractFactory\Text
+     */
+    public static function createText($content)
+    {
+        return new AbstractFactory\Text($content);
+    }
+
+    /**
+     * @static
+     * @param string $path
+     * @param string $name
+     * @return AbstractFactory\Picture
+     */
+    public static function createPicture($path, $name = '')
+    {
+        return new AbstractFactory\Picture($path, $name);
+    }
+}