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<?php |
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|
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/** |
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* Class LP_Quiz_Cache |
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* |
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* @author tungnx |
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* @since 4.2.0 |
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* @version 1.0.0 |
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*/ |
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defined( 'ABSPATH' ) || exit(); |
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|
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class LP_Question_Cache extends LP_Cache { |
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/** |
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* @var null|LP_Question_Cache |
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*/ |
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protected static $instance; |
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/** |
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* @var string |
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*/ |
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protected $key_group_child = 'question'; |
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|
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/** |
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* Get instance |
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* |
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* @return self |
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*/ |
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public static function instance(): self { |
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if ( is_null( self::$instance ) ) { |
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self::$instance = new self(); |
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} |
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|
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return self::$instance; |
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} |
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|
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public function __construct() { |
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parent::__construct(); |
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} |
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} |
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|
