yii2行为的方法如何注入到组件类中详解

public mixed __call ( string $name , array $arguments )

class User {
 public function __call($name, $arguments) {
   echo "Calling object method '$name' "
     . implode(', ', $arguments). "\n";
 }
}

// do it
$model = new User();
$model->hello("abei2017");// Calling object method 'hello' abei2017

class User {
 function Hello($arg) {
  echo __METHOD__, " got $arg\n";
 }
}

$model = new User();
call_user_func_array([$model, "Hello"], ["abei2017"]); // User::Hello got abei2017

// vendor/yiisoft/yii2/base/Component.php
public function __call($name, $params){

 $this->ensureBehaviors();
 foreach ($this->_behaviors as $object) {
  if ($object->hasMethod($name)) {
   return call_user_func_array([$object, $name], $params);
  }
 }
 throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}