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<?php $foo = ['bar' => 'boo']; $baz = ['boo' => 'bay']; $bar = $baz[$foo['bar'] ?? ''] ?? '' ; var_dump($bar); $foo = []; $baz = []; $bar = $baz[$foo['bar'] ?? ''] ?? '' ; var_dump($bar);
Output for git.master, git.master_jit, rfc.property-hooks
string(3) "bay" string(0) ""

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