note 67958 added to language.oop5.patterns
| From: | uvillaseca at yahoo dot es | Date: | Fri, 07 Jul 2006 16:59:06 +0000 |
| Subject: | note 67958 added to language.oop5.patterns | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-114566@lists.php.net to get a copy of this message | ||
I don't know if it's useful has a singleton that is a singleton only inside a script. By
example, having the following scripts:
<?php
//index.php
require_once("Singleton.php");
$p = Singleton::getInstance();
$s = Singleton::getInstance();
?>
<?php
//Singleton.php
class Singleton {
private static $instance;
private function __construct() {
}
public static function getInstance() {
if(!isset(self::$instance)) {
echo 'creating singleton';
self::$instance = new self;
}
return self::$instance;
}
}
?>
Calls to index.php always returns the message 'creating singleton', so a new instance of
the class is created for each call to index.php; and this is not the behaviour that I'd expect.
Best regards,
Ubaldo
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Manual Page -- http://www.php.net/manual/en/language.oop5.patterns.php
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