Factory+Singletonパターン
<?php
class Foo {
private $time = 0;
public function __construct() {
print "creating Foo ..";
sleep(1);
print "..done\n";
$this->time = @date('H:i:s.u');
}
public function getTime() {
return $this->time;
}
}
class Factory {
static private $pool = array();
private function __construct() { }
public static function create($class) {
if (!isset(self::$pool[$class])) {
self::$pool[$class] = new $class;
}
return self::$pool[$class];
}
}
$f0 = new Foo;
$f1 = Factory::create('Foo');
$f2 = Factory::create('Foo');
$f3 = new Foo;
$f4 = Factory::create('Foo');
print $f0->getTime() . "\n";
print $f1->getTime() . "\n";
print $f2->getTime() . "\n";
print $f3->getTime() . "\n";
print $f4->getTime() . "\n";
creating Foo ....done
creating Foo ....done
creating Foo ....done
17:31:32.000000
17:31:33.000000
17:31:33.000000
17:31:34.000000
17:31:33.000000
