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<?php class Foo { public function __construct() { $this->foo = function () { echo 'foo'; }; } public function doFoo() { ($this->foo)(); } } (new Foo())->doFoo();
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Creation of dynamic property Foo::$foo is deprecated in /in/JI7pC on line 8 foo

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