<?php
abstract class Singleton
{
protected static $instance = null;
/**
* make contrutor not public
*/
protected function __construct()
{
}
/**
* @return static
*/
public static function getInstance()
{
if (static::$instance === null) {
static::$instance = new static();
}
return static::$instance;
}
}
class ExampleSingleton extends Singleton
{
public $name = 'x';
}
$s = ExampleSingleton::getInstance();
echo $s->name;
$s->name = 'y';
echo ExampleSingleton::getInstance()->name;
- Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- xy
- Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
- Parse error: syntax error, unexpected T_STATIC in /in/R6A8d on line 22
Process exited with code 255. - Output for 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_STATIC in /in/R6A8d on line 22
Process exited with code 255. - Output for 4.4.2 - 4.4.9
- Parse error: syntax error, unexpected T_CLASS in /in/R6A8d on line 3
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
- Parse error: parse error, unexpected T_CLASS in /in/R6A8d on line 3
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/R6A8d on line 3
Process exited with code 255.
preferences:
298.22 ms | 401 KiB | 456 Q