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Singleton.php
68 lines
| 1 | <?php |
| 2 | /** |
| 3 | * An abstract base class to make Singleton class |
| 4 | * |
| 5 | * @package Tutor\Classes |
| 6 | * @author Themeum <support@themeum.com> |
| 7 | * @link https://themeum.com |
| 8 | * @since 3.0.0 |
| 9 | */ |
| 10 | |
| 11 | namespace TUTOR; |
| 12 | |
| 13 | if ( ! defined( 'ABSPATH' ) ) { |
| 14 | exit; |
| 15 | } |
| 16 | |
| 17 | /** |
| 18 | * Class Singleton |
| 19 | */ |
| 20 | abstract class Singleton { |
| 21 | |
| 22 | /** |
| 23 | * Store instances for each child class. |
| 24 | * |
| 25 | * @var array |
| 26 | */ |
| 27 | private static $instances = array(); |
| 28 | |
| 29 | /** |
| 30 | * Constructor prevent for new instance. |
| 31 | * |
| 32 | * @access protected |
| 33 | */ |
| 34 | protected function __construct() { } |
| 35 | |
| 36 | /** |
| 37 | * Prevent object clone |
| 38 | * |
| 39 | * @access protected |
| 40 | */ |
| 41 | protected function __clone() { } |
| 42 | |
| 43 | /** |
| 44 | * Get instance of class. |
| 45 | * |
| 46 | * @return static |
| 47 | */ |
| 48 | public static function get_instance() { |
| 49 | $class = static::class; |
| 50 | if ( ! isset( self::$instances[ $class ] ) ) { |
| 51 | self::$instances[ $class ] = new static(); |
| 52 | } |
| 53 | return self::$instances[ $class ]; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Reset a class instance |
| 58 | * |
| 59 | * @return void |
| 60 | */ |
| 61 | public static function reset_instance() { |
| 62 | $class = static::class; |
| 63 | if ( isset( self::$instances[ $class ] ) ) { |
| 64 | unset( self::$instances[ $class ] ); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 |