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<?php |
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|
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namespace TableBuilder\Traits; |
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|
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/** |
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* Trait for making singleton instance |
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* This is a factory singleton |
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* |
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* @package Gutenkit\Traits |
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*/ |
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trait Singleton { |
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/** |
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* The Singleton's instance is stored in a static field. This field is an |
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* array, because we'll allow our Singleton to have subclasses. Each item in |
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* this array will be an instance of a specific Singleton's subclass. You'll |
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* see how this works in a moment. |
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*/ |
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private static $instances = array(); |
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|
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/** |
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* This is the static method that controls the access to the singleton |
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* instance. On the first run, it creates a singleton object and places it |
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* into the static field. On subsequent runs, it returns the client existing |
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* object stored in the static field. |
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* |
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* This implementation lets you subclass the Singleton class while keeping |
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* just one instance of each subclass around. |
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* |
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* @return object |
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* @since 1.0.0 |
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*/ |
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public static function instance() { |
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$class = get_called_class(); |
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if ( ! isset( self::$instances[$class] ) ) { |
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self::$instances[$class] = new $class(); |
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} |
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return self::$instances[$class]; |
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} |
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} |
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