Purushotham Komaravolu wrote:
> Is there any way to create a singleton in Php4?
Yes, but this is the wrong list to ask such questions.
Anyhow:
PHP 4
<?php
class Singleton {
function &getInstance() {
static $instance;
if (!isset($instance)) {
echo "Creating new object.\n";
$instance = new Singleton;
}
return $instance;
}
}
$a = Singleton::getInstance();
$b = Singleton::getInstance();
if ($a === $b) {
echo '$a and $b reference the same object.' . "\n";
}
?>
PHP 5
<?php
class Singleton {
static $instance = null;
function getInstance() {
if (self::$instance == null) {
echo "Creating new object.\n";
self::$instance = new Singleton;
}
return self::$instance;
}
}
$a = Singleton::getInstance();
$b = Singleton::getInstance();
if ($a === $b) {
echo '$a and $b reference the same object.' . "\n";
}
?>
--
Sebastian Bergmann
http://sebastian-bergmann.de/ http://phpOpenTracker.de/
Did I help you? Consider a gift: http://wishlist.sebastian-bergmann.de/
--
PHP Development Mailing List <http://www.php.net/>
To unsubscribe, visit: http://www.php.net/unsub.php
