[PHP] laravel框架模型中非静态方法也能静态调用的原理分析

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
  public static function getList()
  {
  return self::get()->toArray();
  }
}

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
  protected function getList()
  {
  return $this->get()->toArray();
  }
}

class Model
{
  public function __call($method, $parameters)
  {
  if (in_array($method, ['increment', 'decrement'])) {
    return $this->$method(...$parameters);
  }
  return $this->forwardCallTo($this->newQuery(), $method, $parameters);
  }
  public static function __callStatic($method, $parameters)
  {
  return (new static)->$method(...$parameters);
  }
}

<?php
namespace App\Models;
class Model
{
  //在对象中调用一个不可访问方法时，__call()被调用
  public function __call($method, $parameters)
  {
  echo '__call()';
  return $this->{$method}(...$parameters);
  }
  //在静态上下文中调用一个不可访问方法时，__callStatic()被调用
  public static function __callStatic($method, $parameters)
  {
  echo '__callStatic()';
  //注意这里，通过延迟静态绑定，仍然new了一个实例
  return (new static)->{$method}(...$parameters);
  }
  private function test()
  {
  echo '被调用了<br>';
  }
}

<?php
namespace App\Http\Controllers\Test;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Models\Model;
class Test extends Controller
{
  public function index(Request $request)
  {
  //对象调用
  (new Model())->test();
  //静态方法调用
  Model::test();
  }
}