3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a=array(); $a[-2]='a'; $a[-1]='b'; $a[0] ='c'; $a[ 1]='d'; $obj=(object)$a; echo gettype($obj).": \n"; echo $obj->{-2}.', '.$obj->{0}.', '.$obj->{1}."\n"; echo $obj->{'-2'}.', '.$obj->{'0'}.', '.$obj->{'1'}."\n"; $b =(array)$obj; echo $b[-2].', '.$b[0].', '.$b[1]."\n"; $obj=unserialize(serialize($obj)); echo $obj->{-2}.', '.$obj->{0}.', '.$obj->{1}."\n"; ?>
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object: a, c, d a, c, d a, c, d a, c, d
Output for 5.3.9 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
object: Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 10 , , Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 11 , , a, c, d a, c, d
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.8
object: Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 10 , , Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 11 , , a, c, d Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 16 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 16 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 16 , ,
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.5
object: Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 10 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 10 , , Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 11 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 11 , , a, c, d Notice: Undefined property: stdClass::$-2 in /in/b7vJ8 on line 16 Notice: Undefined property: stdClass::$0 in /in/b7vJ8 on line 16 Notice: Undefined property: stdClass::$1 in /in/b7vJ8 on line 16 , ,
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Property name must be a string in /in/b7vJ8 on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.2
object: Notice: Undefined property: -2 in /in/b7vJ8 on line 10
Process exited with code 139.
preferences:
245.35 ms | 401 KiB | 451 Q