<?php
class Singleton
{
private static $instance = null;
final private function __construct() {}
final private function __clone() {}
final private function __sleep() {}
final private function __invoke() {}
public static function getInstance()
{
if (!self::$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();
var_dump($oneInstance, $secondInstance);
Warning: Private methods cannot be final as they are never overridden by other classes in /in/b4AOs on line 8
Warning: Private methods cannot be final as they are never overridden by other classes in /in/b4AOs on line 9
Warning: The magic method Singleton::__sleep() must have public visibility in /in/b4AOs on line 9
Warning: Private methods cannot be final as they are never overridden by other classes in /in/b4AOs on line 10
Warning: The magic method Singleton::__invoke() must have public visibility in /in/b4AOs on line 10
Cloneable outside:bool(false)
object(Singleton)#1 (0) {
}
object(Singleton)#4 (0) {
}
Warning: The magic method __invoke() must have public visibility and cannot be static in /in/b4AOs on line 10
Cloneable outside:bool(false)
object(Singleton)#1 (0) {
}
object(Singleton)#4 (0) {
}
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/b4AOs on line 22
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/b4AOs on line 22
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/b4AOs on line 5
Process exited with code 255.
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/b4AOs 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/b4AOs on line 5
Process exited with code 255.