<?php
trait Singleton
{
protected static $instance;
final public static function getInstance()
{
if (!isset(static::$instance)) {
static::$instance = new static;
}
return static::$instance;
}
}
class a1{
use Singleton;
}
class a2{
use Singleton;
}
$a = a1::getInstance();
$b = a2::getInstance();
$c = a1::getInstance();
$d = a2::getInstance();
var_dump($a,$b,$c,$d);
- Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- object(a1)#1 (0) {
}
object(a2)#2 (0) {
}
object(a1)#1 (0) {
}
object(a2)#2 (0) {
}
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
- Parse error: syntax error, unexpected T_STRING in /in/q7rsK on line 2
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, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_STRING in /in/q7rsK on line 2
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/q7rsK on line 2
Process exited with code 255.
preferences:
212.98 ms | 401 KiB | 357 Q