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Commit fe1a8f8

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Template method
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‎README.md

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* "Decorator" (Structural)
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* "Flyweight" (Structural)
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* "Proxy" (Structural)
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* "Template method" (Behavioral)
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(c) MaxSite.org, 2019, http://maxsite.org/

‎Templatemethod/index.php

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

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