@ 2014-02-14T19:05:30Z <?php
class Singleton
{
private static $instance = null;
final private function __construct() {}
final private function __clone() {}
public function __wakeup()
{
throw new Exception("Cannot unserialize singleton");
}
public static function getInstance()
{
if (!self::$instance) {
self::$instance = new self;
}
return self::$instance;
}
}
$oneInstance = Singleton::getInstance();
echo "Cloneable outside:", var_dump((new ReflectionClass('Singleton'))->isCloneable());
$cloner = function () {
return clone $this;
};
$secondInstance = $cloner->bindTo($oneInstance, 'Singleton');//->__invoke();
// $thirdInstance = clone $oneInstance;
var_dump($secondInstance);
$reflection = new ReflectionClass($secondInstance);
var_dump($reflection->getMethods());
var_dump($reflection->getMethod('bind'));
var_dump($reflection->getMethod('bindTo'));
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Output for 8.0.0 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.6 Warning: Private methods cannot be final as they are never overridden by other classes in /in/kZMuW on line 8
Cloneable outside:bool(false)
object(Closure)#3 (1) {
["this"]=>
object(Singleton)#1 (0) {
}
}
array(6) {
[0]=>
object(ReflectionMethod)#5 (2) {
["name"]=>
string(11) "__construct"
["class"]=>
string(7) "Closure"
}
[1]=>
object(ReflectionMethod)#6 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
[2]=>
object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
[3]=>
object(ReflectionMethod)#8 (2) {
["name"]=>
string(4) "call"
["class"]=>
string(7) "Closure"
}
[4]=>
object(ReflectionMethod)#9 (2) {
["name"]=>
string(12) "fromCallable"
["class"]=>
string(7) "Closure"
}
[5]=>
object(ReflectionMethod)#11 (2) {
["name"]=>
string(8) "__invoke"
["class"]=>
string(7) "Closure"
}
}
object(ReflectionMethod)#11 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
object(ReflectionMethod)#11 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
Output for 7.2.29 - 7.2.33 , 7.3.12 - 7.3.33 , 7.4.0 - 7.4.33 Cloneable outside:bool(false)
object(Closure)#3 (1) {
["this"]=>
object(Singleton)#1 (0) {
}
}
array(6) {
[0]=>
object(ReflectionMethod)#5 (2) {
["name"]=>
string(11) "__construct"
["class"]=>
string(7) "Closure"
}
[1]=>
object(ReflectionMethod)#6 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
[2]=>
object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
[3]=>
object(ReflectionMethod)#8 (2) {
["name"]=>
string(4) "call"
["class"]=>
string(7) "Closure"
}
[4]=>
object(ReflectionMethod)#9 (2) {
["name"]=>
string(12) "fromCallable"
["class"]=>
string(7) "Closure"
}
[5]=>
object(ReflectionMethod)#11 (2) {
["name"]=>
string(8) "__invoke"
["class"]=>
string(7) "Closure"
}
}
object(ReflectionMethod)#11 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
object(ReflectionMethod)#11 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
Output for 7.1.0 - 7.1.20 , 7.2.0 - 7.2.6 Cloneable outside:bool(false)
object(Closure)#3 (1) {
["this"]=>
object(Singleton)#1 (0) {
}
}
array(5) {
[0]=>
object(ReflectionMethod)#5 (2) {
["name"]=>
string(11) "__construct"
["class"]=>
string(7) "Closure"
}
[1]=>
object(ReflectionMethod)#6 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
[2]=>
object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
[3]=>
object(ReflectionMethod)#8 (2) {
["name"]=>
string(4) "call"
["class"]=>
string(7) "Closure"
}
[4]=>
object(ReflectionMethod)#9 (2) {
["name"]=>
string(12) "fromCallable"
["class"]=>
string(7) "Closure"
}
}
object(ReflectionMethod)#9 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
object(ReflectionMethod)#9 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
Output for 7.0.0 - 7.0.20 Cloneable outside:bool(false)
object(Closure)#3 (1) {
["this"]=>
object(Singleton)#1 (0) {
}
}
array(4) {
[0]=>
object(ReflectionMethod)#5 (2) {
["name"]=>
string(11) "__construct"
["class"]=>
string(7) "Closure"
}
[1]=>
object(ReflectionMethod)#6 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
[2]=>
object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
[3]=>
object(ReflectionMethod)#8 (2) {
["name"]=>
string(4) "call"
["class"]=>
string(7) "Closure"
}
}
object(ReflectionMethod)#8 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
object(ReflectionMethod)#8 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
Output for 5.4.0 - 5.4.45 , 5.5.24 - 5.5.35 , 5.6.7 - 5.6.28 Cloneable outside:bool(false)
object(Closure)#3 (1) {
["this"]=>
object(Singleton)#1 (0) {
}
}
array(3) {
[0]=>
&object(ReflectionMethod)#5 (2) {
["name"]=>
string(11) "__construct"
["class"]=>
string(7) "Closure"
}
[1]=>
&object(ReflectionMethod)#6 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
[2]=>
&object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
}
object(ReflectionMethod)#7 (2) {
["name"]=>
string(4) "bind"
["class"]=>
string(7) "Closure"
}
object(ReflectionMethod)#7 (2) {
["name"]=>
string(6) "bindTo"
["class"]=>
string(7) "Closure"
}
Output for 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 , 5.3.0 - 5.3.29 Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/kZMuW on line 25
Process exited with code 255 . Output for 5.0.0 - 5.0.5 Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/kZMuW on line 25
Process exited with code 255 . Output for 4.4.2 - 4.4.9 Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/kZMuW on line 5
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_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/kZMuW on line 5
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/kZMuW on line 5
Process exited with code 255 . preferences:dark mode live preview
253.87 ms | 401 KiB | 315 Q