PHP implements IOC set injection

This paper implements set injection in the form of Java-like annotation.
First DI container code

require ' docparser.php '; class Container{    /** * Use containers to instantiate objects, external call interface * @param $name as class name eg. ' User ' * /     Public  function get($name) {        Static $cache=Array();if(isset($cache[$name]))        {return $cache[$name]; }require ' models/'. Ucfirst ($name) .'. php ';$reflection=NewReflectionclass ($name);$depends=$this->getdependency ($reflection);$cache[$name] =$this->createobject ($reflection,$depends);return $cache[$name]; }/** * Use reflection to get the dependency conditions required by the class, the comment contains the public variable for the @inject annotation * @param $reflection reflectionclass */     Public  function getdependency($reflection) {        $depends=Array();$props=$reflection->getproperties (Reflectionproperty::is_public);foreach($props  as $prop) {$str=$prop->getdoccomment ();$parser=NewDocparser ();$anotations=$parser->parse ($str);if(isset($anotations[' inject ']))            {$depends[$prop->getname ()] =$anotations[' inject ']; }        }return $depends; }/** * Method of instantiating an object * @param $instance reflectionclass * @param $depends Array (' field ' = ' class '), field is the injected variable name, class is the injected classes * /     Public  function createobject($instance, $depends) {        $instance=$instance->newinstanceargs (Array());foreach($depends  as $key=$value)        {$instance->{$key} =$this->get ($value); }return $instance; }}

Which DocParser.php is the tool class for parsing PHP annotations.

• How to use this article
  Create a new folder under a sibling directory models , create a newUser.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;    publicfunction sendEmail()    {        $this->email->sendEmail();    }}

NewEmail.php

class Email{    publicfunction sendEmail()    {        echo‘send email!‘;    }}

In the root directory, create a newindex.php

require‘Container.php‘;$dinew Container();$user$di->get(‘User‘);$user->sendEmail();

Run and index.php you can see the results.
This article only demonstrates the IOC implementation process, without considering the actual usage scenario.

Source

PHP implements IOC set injection