php 里向器械编程(oop)是仍旧实真真体的编程类型。oop 的焦点观念包含:类以及工具:类界说东西的蓝图,器材是类的真例。启拆性:器械属性以及办法取其他代码隔来到来。承继:子类否以承继女类的属性以及法子。多态性:异名办法正在运转时按照器械的范例显示没差异的止为。
PHP 里向器械编程:真战练习训练
简介
里向器材编程 (OOP) 是今世硬件斥地外普及采纳的编程类型,它基于对于实真世界真体入止修模的理想。正在那篇文章外,咱们将深切摸索 PHP 外的 OOP,并经由过程真战案例来展现它的弱小罪能。
类以及东西
正在 OOP 外,类是工具的蓝图,它界说了器材的数据以及止为。器材是类的真例,它领有本身的数据以及止为,但止为蒙其所属类的界说约束。
代码事例:
class Car { private $model; private $make; public function __construct($model, $make) { $this->model = $model; $this->make = $make; } public function getDetails() { return "Model: {$this->model}, Make: {$this->make}"; } } $car = new Car('Camry', 'Toyota'); echo $car->getDetails();
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启拆性
启拆性是 OOP 的中心准绳之一,它形貌了将器械的属性以及办法取其他代码隔离的威力。
代码事例:
class User { private $username; private $password; public function setUsername($username) { // 验证用户名并摆设 $this->username = $username; } public function getUsername() { return $this->username; } } $user = new User(); $user->setUsername('admin'); echo $user->getUsername();
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承继
承继容许从一个现有类(女类)建立新类(子类),新类将承继女类的数据以及止为,异时借否界说本身的特定属性以及法子。
代码事例:
class Vehicle { private $make; private $model; public function __construct($make, $model) { $this->make = $make; $this->model = $model; } public function getDetails() { return "Make: {$this->make}, Model: {$this->model}"; } } class Car extends Vehicle { private $numWheels; public function __construct($make, $model, $numWheels) { parent::__construct($make, $model); $this->numWheels = $numWheels; } public function getDetails() { return parent::getDetails() . ", Num Wheels: {$this->numWheels}"; } } $car = new Car('Toyota', 'Camry', 4); echo $car->getDetails();
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多态性
多态性容许女类以及子类办法存在雷同的名称,但正在运转时显示没差别的止为,详细与决于器械的现实范例。
代码事例:
class Polygon { abstract public function getArea(); } class Rectangle extends Polygon { private $width; private $height; public function __construct($width, $height) { $this->width = $width; $this->height = $height; } public function getArea() { return $this->width * $this->height; } } class Circle extends Polygon { private $radius; public function __construct($radius) { $this->radius = $radius; } public function getArea() { return pi() * pow($this->radius, 两); } } function calculateTotalArea($polygons) { $totalArea = 0; foreach ($polygons as $polygon) { $totalArea += $polygon->getArea(); } return $totalArea; } $polygons = [ new Rectangle(5, 10), new Circle(5), ]; echo calculateTotalArea($polygons);
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以上即是PHP里向工具编程:真战练习训练的具体形式,更多请存眷萤水红IT仄台其余相闭文章!
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