search
HomeBackend DevelopmentPHP TutorialPHP 实现 IOC set 注入

本文采用类似java中annotation的形式实现set注入
首先DI容器代码

require 'DocParser.php';class Container {    /** * 利用容器来实例化对象,外部调用接口 *@param $name 为类名 eg. 'User' */    public function get($name) {        static $cache = array();        if(isset($cache[$name]))        {            return $cache[$name];        }        require 'models/' . ucfirst($name) . '.php';        $reflection = new ReflectionClass($name);        $depends = $this->getDependency($reflection);        $cache[$name] = $this->createObject($reflection, $depends);        return $cache[$name];    }    /** * 利用反射获取类需要的依赖条件,注释中包含@inject 注解的public 变量 * @param $reflection ReflectionClass */    public function getDependency($reflection) {        $depends = array();        $props = $reflection->getProperties(ReflectionProperty::IS_PUBLIC);        foreach ($props as $prop) {            $str = $prop->getDocComment();            $parser = new DocParser();            $anotations = $parser->parse($str);            if(isset($anotations['inject']))            {                $depends[$prop->getName()] = $anotations['inject'];            }        }        return $depends;    }    /** * 实例化对象的方法 * @param $instance ReflectionClass * @param $depends array( 'field' => 'Class' ), field 为注入的变量名,class为注入的类 */    public function createObject($instance, $depends) {        $instance = $instance->newInstanceArgs(array());        foreach ($depends as $key => $value)        {            $instance->{$key} = $this->get($value);        }        return $instance;    }}

其中 DocParser.php 为解析php注释的工具类。

  • 使用方法篇
    在同级目录下新建models文件夹,新建User.php
  • class User {    /** * 使用inject注解来标明该变量需要注入,后面跟着需要注入的类名 * @inject Email */    public $email;    public function sendEmail() {        $this->email->sendEmail();    }}

    新建Email.php

    class Email {    public function sendEmail() {        echo 'send email!';    }}

    在根目录下新建index.php

    require 'Container.php';$di = new Container();$user = $di->get('User');$user->sendEmail();

    运行一下index.php就能看到结果了。
    本文只是演示IOC的实现过程,没有考虑实际使用场景。

    源码 下载地址

    Statement
    The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
    The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

    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: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

    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 and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

    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 and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

    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.

    Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

    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 and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

    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.

    PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

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

    How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

    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.

    See all articles

    Hot AI Tools

    Undresser.AI Undress

    Undresser.AI Undress

    AI-powered app for creating realistic nude photos

    AI Clothes Remover

    AI Clothes Remover

    Online AI tool for removing clothes from photos.

    Undress AI Tool

    Undress AI Tool

    Undress images for free

    Clothoff.io

    Clothoff.io

    AI clothes remover

    Video Face Swap

    Video Face Swap

    Swap faces in any video effortlessly with our completely free AI face swap tool!

    Hot Tools

    MantisBT

    MantisBT

    Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

    PhpStorm Mac version

    PhpStorm Mac version

    The latest (2018.2.1) professional PHP integrated development tool

    MinGW - Minimalist GNU for Windows

    MinGW - Minimalist GNU for Windows

    This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

    mPDF

    mPDF

    mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

    ZendStudio 13.5.1 Mac

    ZendStudio 13.5.1 Mac

    Powerful PHP integrated development environment