php ioc - yaokun123/php-wiki GitHub Wiki
<?php
/**
* Created by PhpStorm.
* User: yaok
* Date: 2021/4/12
* Time: 下午4:49
*/
/**工具类,通过该类来实现自动依赖注入
* Class Ioc
*/
class Ioc{
//获得类的对象实例
public static function getInstance($className){
$paramArr = self::getMethodParams($className);
return (new ReflectionClass($className))->newInstanceArgs($paramArr);
}
//执行类的方法
public static function make($className,$methodName,$params=[]){
//获取类的实例
$instance = self::getInstance($className);
//获取该方法所需要的依赖注入参数
$paramArr = self::getMethodParams($className,$methodName);
return $instance->$methodName(...array_merge($paramArr,$params));
}
protected static function getMethodParams($className,$methodsName='__construct'){
//通过反射获得该类
$class = new ReflectionClass($className);
$paramArr = [];//记录参数,和参数类型
//判断该类是否有构造函数
if($class->hasMethod($methodsName)){
//获取构造函数
$construct = $class->getMethod($methodsName);
//判断构造函数是否有参数
$params = $construct->getParameters();
if(count($params) > 0){
//判断参数类型
foreach($params as $key=>$param){
if($paramClass = $param->getClass()){
//获得参数类型名称
$paramClassName = $paramClass->getName();
//获得参数类型
$args = self::getMethodParams($paramClassName);
$paramArr[] = (new ReflectionClass($paramClassName))->newInstanceArgs($args);
}
}
}
}
return $paramArr;
}
}
//测试
class A{
protected $cObj;
//用户测试多级依赖注入 B依赖A, A依赖C
public function __construct(C $c)
{
$this->cObj = $c;
}
public function aa(){
echo 'this is A->test';
}
public function aac(){
$this->cObj->cc();
}
}
class B{
protected $aObj;
//测试构造函数依赖注入 B依赖A
public function __construct(A $a)
{
$this->aObj = $a;
}
//测试方法调用依赖注入
public function bb(C $c,$b){
$c->cc();
echo PHP_EOL;
echo 'params:'.$b;
}
//验证依赖注入是否成功
public function bbb(){
$this->aObj->aac();
}
}
class C{
public function cc(){
echo 'this is C->cc';
}
}
//测试构造函数的依赖注入
//使用Ioc来创建B类的实例,B的构造函数依赖A类,A的构造函数依赖C类
$bObj = Ioc::getInstance('B');
$bObj->bbb();//输出 this is C->cc,说明依赖注入成功
//var_dump($bObj);
//测试方法依赖注入
Ioc::make('B', 'bb', ['this is param b']);
// 输出结果,可以看出依赖注入成功。
//this is C->cc
//params:this is param b
/*class A{
public $q = 1111;
}
class Test{
public $a = 1;
protected $b = 2;
private $c = 3;
public function __construct(A $a){
echo "111";
}
}
$a = Ioc::getInstance('Test');
print_r($a);*/