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<?php #[AllowDynamicProperties] class withDynamic { } class noDynamic { } $withDyn = new withDynamic(); $withDyn->foo = 'bar'; var_Dump($withDyn); $noDyn = new noDynamic(); $noDyn->foo = 'bar'; var_Dump($noDyn);
Output for git.master, git.master_jit, rfc.property-hooks
object(withDynamic)#1 (1) { ["foo"]=> string(3) "bar" } Deprecated: Creation of dynamic property noDynamic::$foo is deprecated in /in/Vj7Zu on line 16 object(noDynamic)#2 (1) { ["foo"]=> string(3) "bar" }

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