搞定，吃飯

<?php /* The purpose of singleton pattern is to restrict instantiation of class to a single object. It is implemented by creating a method within the class that creates a new instance of that class if one does not exist. If an object instance already exists, the method simply returns a reference to an existing object. */class Logger {private static $instance;public static function getInstance() {if (!isset(self::$instance)) {self::$instance = new self;}return self::$instance;}public function logNotice($msg) {return 'logNotice: ' . $msg . '<br/>';}public function logWaring($msg) {return 'logWaring: ' . $msg . '<br/>';}public function logError($msg) {return 'logError: ' . $msg . '<br/>';} }echo Logger::getInstance()->logNotice('test-log-notice'); echo Logger::getInstance()->logWaring('test-log-waring'); echo Logger::getInstance()->logError('test-log-error'); ?>

轉載于:https://www.cnblogs.com/aguncn/p/11179972.html

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