Friends who have bought mobile phones online know that merchants usually match several packages for mobile phones, allowing customers to choose freely. Now there is a store selling mobile phones that has launched three packages for all mobile phones. The standard package is 4999 yuan. , the bare metal is 200 yuan off the standard package, and the full configuration is 100 yuan extra on the standard package. We use PHP to implement it.
<?php abstract class mobile{ abstract public function getInfo(); abstract public function getPrice(); } class iphone extends mobile{ private $price=4999; private $info='官方标配(手机+电源+数据线+耳机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->price; } } class bareIphone extends iphone{ private $info='裸机(手机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return parent::getPrice()-200; } } class fullSetIphone extends iphone{ private $info='套装(手机+电源+数据线+耳机+手机壳+贴膜+移动电源)'; public function getInfo(){ return $this->info; } public function getPrice(){ return parent::getPrice()+100; } } class lumia920 extends mobile{ private $price=4399; private $info='官方标配(手机+电源+数据线+耳机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->price; } } class bareLumia920 extends lumia920{ private $info='裸机(手机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return parent::getPrice()-200; } } class fullSetLumia920 extends lumia920{ private $info='套装(手机+电源+数据线+耳机+手机壳+贴膜+移动电源)'; public function getInfo(){ return $this->info; } public function getPrice(){ return parent::getPrice()+100; } } $iphone=new fullSetIphone(); echo 'iphone全套配置价格为:'.$iphone->getPrice().',配置为:'.$iphone->getInfo(); echo '<br>'; $lumia920=new bareLumia920(); echo 'lumia920全套配置价格为:'.$lumia920->getPrice().',配置为:'.$lumia920->getInfo(); ?>
We have set three packages for iPhone and Lumia920 respectively, but if you look at it, you can find that the bare method and fullSet method of iPhone and Lumia920 are exactly the same, which creates a kind of coupling. We can completely use bare The method is separated from the fullSet method, which requires decoration mode. The code is as follows:
<?php abstract class mobile{ abstract public function getInfo(); abstract public function getPrice(); } class iphone extends mobile{ private $price=4999; private $info='官方标配(手机+电源+数据线+耳机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->price; } } class lumia920 extends mobile{ private $price=4399; private $info='官方标配(手机+电源+数据线+耳机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->price; } } //装饰类 abstract class decorateIphone extends mobile{ protected $iphone; public function __construct(mobile $iphone){ $this->iphone=$iphone; } } class bare extends decorateIphone{ private $info='裸机(手机)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->iphone->getPrice()-200; } } class fullSet extends decorateIphone{ private $info='套装(手机+电源+数据线+耳机+手机壳+贴膜+移动电源)'; public function getInfo(){ return $this->info; } public function getPrice(){ return $this->iphone->getPrice()+100; } } $iphone=new fullSet(new iphone()); echo 'iphone全套配置价格为:'.$iphone->getPrice().',配置为:'.$iphone->getInfo(); echo '<br>'; $lumia920=new bare(new lumia920()); echo 'lumia920裸机价格为:'.$lumia920->getPrice().',配置为:'.$lumia920->getInfo(); ?>
The above is the content of PHP object-oriented development - decoration mode. For more related content, please pay attention to the PHP Chinese website (www.php .cn)!

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

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.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

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

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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