Template method

Author: maxsite

README.md

@@ -19,6 +19,7 @@ See details on http://maxsite.org/page/php-patterns
 * "Decorator" (Structural)
 * "Flyweight" (Structural)
 * "Proxy" (Structural)
+* "Template method" (Behavioral)
 
 
 (c) MaxSite.org, 2019, http://maxsite.org/

Templatemethod/index.php

@@ -0,0 +1,121 @@
+<?php
+
+/**
+ * Design pattern "Template method" (Behavioral)
+ * This is demo code
+ * See for details: http://maxsite.org/page/php-patterns
+ */
+
+/**
+ * Base class
+ */
+abstract class AlgorithmAbstract
+{
+ // abstract methods
+ abstract function step1();
+ abstract function step2();
+
+ // method with implement
+ function baseOperation()
+ {
+ echo 'AlgorithmAbstract baseOperation<br>';
+ }
+
+ // free method
+ function hook() {}
+ 
+ // Run all Actions — this is algorithm
+ function run()
+ {
+ $this->step1();
+ $this->step2();
+ $this->baseOperation();
+ $this->hook();
+ }
+}
+
+/**
+ * Class1 for sample
+ */
+class Class1 extends AlgorithmAbstract
+{
+ function step1()
+ {
+ echo 'Class1 step1<br>';
+ }
+
+ function step2()
+ {
+ echo 'Class1 step2<br>';
+ }
+}
+
+/**
+ * Class2 for sample
+ */
+class Class2 extends AlgorithmAbstract
+{
+ function step1()
+ {
+ echo 'Class2 step1<br>';
+ }
+
+ function step2()
+ {
+ echo 'Class2 step2<br>';
+ }
+
+ function hook()
+ {
+ echo 'Class2 hook<br>';
+ }
+
+ function baseOperation()
+ {
+ echo 'Class2 baseOperation<br>';
+ }
+}
+
+/**
+ * Class3 for sample
+ */
+class Class3 extends Class2
+{
+ // replace method in Class2
+ function step2()
+ {
+ echo 'Class3 step2<br>';
+ }
+}
+
+/**
+ * demo
+ */
+
+$a = new Class1();
+$a->run();
+/*
+ Class1 step1
+ Class1 step2
+ AlgorithmAbstract baseOperation
+*/
+
+$b = new Class2();
+$b->run();
+/*
+ Class2 step1
+ Class2 step2
+ Class2 baseOperation
+ Class2 hook
+*/
+
+$c = new Class3();
+$c->run();
+/*
+ Class2 step1
+ Class3 step2
+ Class2 baseOperation
+ Class2 hook
+*/
+
+# end of file