some confusions to singleton pattern in PHP
In my team I've been told to write resource class like this style: class MemcacheService { private static $instance = null; private function __construct() { } public static function getInstance($fortest = false) { if (self::$instance == null) { self::$instance = new Memcached(); if ($fortest) { self::$instance->addServer(MEMTEST_HOST, MEMTEST_PORT); } else { self::$instance->addServer(MEM_HOST, ME
PHP singleton database connection pattern
I've been working on a small project using PHP and MySQL. I've read a lot around about best practices on managing a connection and so on. I've also implemented (following some posts found around) a singleton class to manage MySQL connections. require_once 'config.inc.php'; class DbConn { private static $instance; private $dbConn; private function __construct() {} /** * * @return DbConn */ private
How can I validate an email address using a regular expression?
The fully RFC 822 compliant regex is inefficient and obscure because of its length. Fortunately, RFC 822 was superseded twice and the current specification for email addresses is RFC 5322. RFC 5322 leads to a regex that can be understood if studied for a few minutes and is efficient enough for actual use. One RFC 5322 compliant regex can be found at the top of the page at http://emailregex.com/ bu
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How to format hour and minute in Chinese with PHP
