<?php

/**

* @link https://www.yiiframework.com/

* @copyright Copyright (c) 2008 Yii Software LLC

* @license https://www.yiiframework.com/license/

*/

namespace yii\base;

use Yii;

/**

* StaticInstanceTrait provides methods to satisfy [[StaticInstanceInterface]] interface.

*

* @see StaticInstanceInterface

*

* @author Paul Klimov <[email protected]>

* @since 2.0.13

*/

trait StaticInstanceTrait

{

/**

* @var static[] static instances in format: `[className => object]`

*/

private static $_instances = [];

/**

* Returns static class instance, which can be used to obtain meta information.

* @param bool $refresh whether to re-create static instance even, if it is already cached.

* @return static class instance.

*/

public static function instance($refresh = false)

{

$className = get_called_class();

if ($refresh || !isset(self::$_instances[$className])) {

self::$_instances[$className] = Yii::createObject($className);

}

return self::$_instances[$className];

}

}