我试图理解php中mvc架构的一些高级概念,比如使用psr-4和依赖注入容器自动加载。我使用composer autoload创建了一个依赖注入容器和加载类。 每当我运行此代码时,我都会收到以下错误:
致命错误:带有消息的未捕获异常'ReflectionException' '等级测试不存在' C:\ xampp \ htdocs \ practice \ reflection \ Container \ Container.php:15 Stack 追踪:#0 C:\ XAMPP \ htdocs中\实践\反射\集装箱\ Container.php(15): ReflectionClass-> __ construct('Test')#1 C:\ XAMPP \ htdocs中\实践\反射\的index.php(9): Container \ Container :: newInstanceOf('Test')#2 {main}引入 C:\ XAMPP \ htdocs中\实践\反射\集装箱\ Container.php
看起来像Container.php没有从控制器目录中获取类。我找不到这个问题背后的原因。
我的目录结构如下:
-reflection Directory
-Controller folder
-Test.php
-Test2.php
-Container Directory
-Container.php
-vendor Directory
-index.php
的index.php:
require 'vendor/autoload.php';
use Container\Container;
use Controller\Test;
use Controller\Test2;
$test = Container::newInstanceOf('Test');
$test->testHi();
Container.php:
namespace Container;
class Container
{
public static function newInstanceOf($class)
{
$reflection = new \ReflectionClass($class);
$constructor = $reflection->getConstructor();
if ( ! $constructor)
{
return new $class;
}
$params = $constructor->getParameters();
if (count($params) === 0)
{
return new $class;
}
$newInstanceParams = [];
foreach($params as $param)
{
if(is_null($param->getClass()))
{
$newInstanceParam[] = null;
continue;
}
$newInstanceParams[] = self::newInstanceOf($param->getClass()->getName());
}
return $reflection->newInstanceArgs($newInstanceParams);
}
}
Test.php:
namespace Controller;
class Test
{
private $test2;
public function __construct(Test2 $test2)
{
$this->test2 = $test2;
}
public function testHi()
{
$this->test2->test2Hi();
}
}
Test2.php:
namespace Controller;
class Test2
{
public function __construct()
{
}
public function test2Hi()
{
echo 'hi from test 2 !';
}
}
Composer.json:
{
"autoload":{
"psr-4":{
"Controller\\" : "Controller",
"Container\\" : "Container"
}
}
}
答案 0 :(得分:1)
更改行:
$test = Container::newInstanceOf('Test');
到:
$test = Container::newInstanceOf('Controller\Test');