


PHP implementation of simple factory pattern c# simple factory pattern factory pattern java java simple factory pattern example
以下内容以一个简单的计算器程序作为案例分析。第一步,定义Operation,是一个父类,有两个属性,表示用于计算的两个参数。
<?php /* * 计算类 */ class Operation{ private $numA=0; private $numB=0; public function setNumA($numA) { $this->numA=$numA; } public function getNumA() { return $this->numA; } public function setNumB($numB) { $this->numB=$numB; } public function getNumB() { return $this->numB; } } ?>
The second step is to define an interface, which declares the method to implement the operation
<?php /* *工厂接口 */ interface InterOperate{ function getResult(); } ?>
The third step is an addition operation class (omitting the subtraction class, multiplication class, trigger class, etc.)
<?php /** * 加法运算类 */ include_once "IOperate.php"; include_once 'Operation.php'; class OperationAdd extends Operation implements InterOperate { function getResult() { $result=$this->getNumA()+$this->getNumB(); return $result; } } ?>
Finally, define a simple factory class for creating object instances of various classes. Usually the objects returned by simple factory classes have a common parent class. In this example, the common parent class is the Operation class, and the addition class and the subtraction class are both subclasses of Operation.
<?php include_once "OperationAdd.php"; include_once "OperationMinus.php"; class SimpleFactory { static function createAdd() { return new OperationAdd; } static function createMinus() { return new OperationMinus; } } ?>
The client code is as follows:
<?php /* * 客户端代码 */ include_once "OperationAdd.php"; include_once 'Operation.php'; include_once 'SimpleFactory.php'; $op=SimpleFactory::createAdd(); $op->setNumA(2); $op->setNumB(4); echo $op->getResult(); $om=SimpleFactory::createMinus(); $om->setNumA(45); $om->setNumB(34); echo "<br>"; echo $om->getResult(); ?>
The above introduces the PHP implementation of the simple factory pattern, including the content of the simple factory pattern. I hope it will be helpful to friends who are interested in PHP tutorials.

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PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

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PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

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