ReflectionNamedType::getName

(PHP 7 >= 7.1.0, PHP 8)

ReflectionNamedType::getName — 以字符串形式获取类型的名称

说明

public ReflectionNamedType::getName ( ) : string

参数

此函数没有参数。

返回值

返回被反射的类型的名称。

参见

User Contributed Notes

e3jeremy at gmail dot com 04-Jul-2018 07:28
Method "getName" is available when you access getType from getParameters from class reports information of a method(ReflectionMethod).
No need to instantiate the ReflectionNamedType.

Below is my custom method on resolving method dependencies, getName is a big help.

<?php

class A
{
    public function my()
    {
        return ' My ';
    }
}

class B
{
    public function __construct(A $a)
    {
        $this->a = $a;
    }

    public function hello($string)
    {
        return 'Hello' . $this->a->my() . $string . '.';
    }
}

class C
{
    public function print($instance, $method)
    {
        $params = ['World'];

        echo call_user_func_array(array($instance, $method), array_merge($this->resolveMethodDependencies($instance, $method), $params));
    }

    public function instantiate($class)
    {
        if(method_exists($class, '__construct')) $instance = new $class(...$this->resolveMethodDependencies($class, '__construct'));
        else $instance = new $class;

        return $instance;
    }

    protected function resolveMethodDependencies($class, $method)
    {
        $params = [];
        $reflection = new \ReflectionMethod($class, $method);

        foreach ($reflection->getParameters() as $param) {

            if($type = $param->getType()) {

                if(!$type || !$this->instatiatable ($type)) continue;

                // This is the right way to get the class name in string.
                $className = $type->getName();

                // This will throw error.
                // $className = $param->getType();

                // Alos this one will do the trick.
                // $className = (string) $param->getType();

                if(method_exists($className, '__construct')) {
                    $params[] = new $className(...$this->resolveMethodDependencies($className, '__construct'));
                    continue;
                }

                $params[] = new $className;
            }
        }
        return $params;
    }

    protected function instatiatable ($type)
    {
        // Add conditon if something is leftout.
        // This is to ensure that the type is existing class.
        return $type != 'Closure' && !is_callable($type) && class_exists($type);
    }
}

$class = new C;

$class->print(
    $class->instantiate('B'), 'hello'
);

Output:
Hello My World.
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