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<?php // Everything you enter here will be executed by our servers. Try it! function func(&$val) { } $a = array(); func($a['x']['x']['x']); var_dump($a);

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Output for Lexical anon
array(1) { ["x"]=> array(1) { ["x"]=> array(1) { ["x"]=> NULL } } }
Output for Typed properties
array(1) { ["x"]=> array(1) { ["x"]=> array(1) { ["x"]=> NULL } } }

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