3v4l.org

run code in 500+ PHP versions simultaneously
<?php echo "Using plain class\n"; class A {}; $a = new A(); $a->foo = 'bar'; echo "Extending from stdClass\n"; class B extends stdClass {}; $b = new B(); $b->foo = 'bar'; echo "Using PHP attribute\n"; #[\AllowDynamicProperties] class C {}; $c = new C(); $c->foo = 'bar';
Output for 8.2.10 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Using plain class Deprecated: Creation of dynamic property A::$foo is deprecated in /in/WCQRP on line 7 Extending from stdClass Using PHP attribute
Output for 8.1.23 - 8.1.34
Using plain class Extending from stdClass Using PHP attribute

preferences:
75.28 ms | 882 KiB | 4 Q