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                ## 單例模式的實現 ~~~ <?php /** * summary */ class Database { /** * summary */ protected $db; private function __construct() { } static function getInstance(){ if (self::$db) { return self::$db; }else { self::$db = new self(); } } } ?> ~~~ ## 工廠模式 使用靜態方法,封裝new Class(),而不是直接new Class().如果累有修改,只需要修改靜態方法就行了,不用修改多出 ## 注冊樹模式 ## 自動加載 ~~~ <?php // function __autoload($class) { // include 'classes/' . $class . '.class.php'; // } function my_autoloader($class) { include 'classes/' . $class . '.class.php'; } spl_autoload_register('my_autoloader'); // 或者,自 PHP 5.3.0 起可以使用一個匿名函數 spl_autoload_register(function ($class) { include 'classes/' . $class . '.class.php'; }); ?> ~~~
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