Strategy

Author: maxsite

README.md

@@ -11,6 +11,7 @@ See details on http://maxsite.org/page/php-patterns
 * "Registry" (Structural)
 * "Composite" (Structural)
 * "Builder" (Creational)
+* "Strategy" (Behavioral)
 
 
 (c) MaxSite.org, 2019, http://maxsite.org/

Strategy/index.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * Design pattern "Strategy" (Behavioral)
+ * This is demo code
+ * See for details: http://maxsite.org/page/php-patterns
+ */
+
+/**
+ * Methods of Strategy
+ */
+interface Strategy
+{
+ public function execute();
+}
+
+/**
+ * Strategy A
+ */
+class StrategyA implements Strategy
+{
+ public function execute()
+ {
+ echo 'StrategyA execute<br>';
+ }
+}
+
+/**
+ * Strategy B
+ */
+class StrategyB implements Strategy
+{
+ public function execute()
+ {
+ echo 'StrategyB execute<br>';
+ }
+}
+
+/**
+ * Base Context
+ */
+class Context
+{
+ private $strategy;
+
+ public function __construct(Strategy $strategy)
+ {
+ $this->strategy = $strategy;
+ }
+
+ public function execute()
+ {
+ $this->strategy->execute();
+ }
+}
+
+/**
+ * demo
+ */
+
+$context = new Context(new StrategyA()); // first strategy
+$context->execute();
+/*
+ StrategyA execute
+ */
+
+$context = new Context(new StrategyB()); // other strategy
+$context->execute();
+/*
+ StrategyB execute
+ */
+
+# end of file