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<?php $s = '?/render/shell'; function f($char) { switch ($char) { case '/': return $char; case '?': return $char; default: return false; } } var_dump(f($s[0]));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(1) "?"