Builder

Author: maxsite

Builder/index.php

@@ -0,0 +1,156 @@
+<?php
+
+/**
+ * Design pattern "Builder" (Creational)
+ * This is demo code
+ * See for details: http://maxsite.org/page/php-patterns
+ */
+
+/**
+ * Sample Product
+ */
+class Product
+{
+ private $list;
+
+ public function add($elem)
+ {
+ $this->list[] = $elem;
+ }
+
+ public function getProduct()
+ {
+ foreach ($this->list as $el) {
+ echo $el . '<br>';
+ }
+ }
+}
+
+/**
+ * Director use builder
+ */
+class Director
+{
+ public function setConstruct($builder)
+ {
+ $builder->buildPartA();
+ $builder->buildPartB();
+ }
+}
+
+/**
+ * base for Builder
+ */
+abstract class BuilderAbstract
+{
+ public function buildPartA()
+ {
+ }
+
+ public function buildPartB()
+ {
+ }
+
+ abstract public function getResult();
+}
+
+/**
+ * Builder1 knows how to make a product
+ */
+class ConcreteBuilder1 extends BuilderAbstract
+{
+ private $product;
+
+ public function __construct()
+ {
+ $this->product = new Product();
+ }
+
+ public function buildPartA()
+ {
+ $this->product->add('Builder First Part A');
+ }
+
+ public function buildPartB()
+ {
+ $this->product->add('Builder First Part B');
+ }
+
+ public function getResult()
+ {
+ return $this->product;
+ }
+}
+
+/**
+ * Builder2 knows how to make a product
+ */
+class ConcreteBuilder2 extends BuilderAbstract
+{
+ private $product;
+
+ public function __construct()
+ {
+ $this->product = new Product();
+ }
+
+ public function buildPartA()
+ {
+ $this->product->add('Builder Second Part A');
+ }
+
+ public function buildPartB()
+ {
+ $this->product->add('Builder Second Part B');
+ }
+
+ public function getResult()
+ {
+ return $this->product;
+ }
+}
+
+
+/**
+ * demo
+ */
+
+/**
+ * set director
+ */
+$director = new Director();
+
+/**
+ * set builders
+ */
+$builder1 = new ConcreteBuilder1();
+$builder2 = new ConcreteBuilder2();
+
+/**
+ * set Construct
+ */
+$director->setConstruct($builder1);
+
+/**
+ * get product
+ */
+$product1 = $builder1->getResult();
+$product1->getProduct();
+/*
+ Builder First Part A
+ Builder First Part B
+ */
+
+/**
+ * use builder2 for other product2
+ */
+$director->setConstruct($builder2);
+$product2 = $builder2->getResult();
+$product2->getProduct();
+/*
+ Builder Second Part A
+ Builder Second Part B
+ */
+
+
+# end of file

README.md

@@ -10,6 +10,7 @@ See details on http://maxsite.org/page/php-patterns
 * "Multiton" (Creational)
 * "Registry" (Structural)
 * "Composite" (Structural)
+* "Builder" (Creational)
 
 
 (c) MaxSite.org, 2019, http://maxsite.org/