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<?php $username = $_GET['user'] ?: 'nobody'; var_dump($username); $username = $_GET['user'] ?? 'nobody'; var_dump($username);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "user" in /in/D6fcV on line 3 string(6) "nobody" string(6) "nobody"

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