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<?php $msf = true; $esp = false; $ssri = 2343; $res = $msf && (!empty($esp) || empty($ssri)); var_dump($res);
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.16, 8.3.0 - 8.3.3
bool(false)

preferences:
59.87 ms | 402 KiB | 54 Q