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<?php declare(strict_types=1); class CallableArray { private array $foo; public function doFoo(callable $foo): void { $this->foo = $foo; var_dump($this->foo); } } $c = new CallableArray(); $c->doFoo(['CallableArray', 'doFoo']);
Output for git.master_jit, git.master
array(2) { [0]=> string(13) "CallableArray" [1]=> string(5) "doFoo" }

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