Use the method: if (is_file ( ./firewall.php )) {require_once ( .firewall.php ) ) Note the correctness of the relative path! Replace $ _GET [ str ] with check ($ _ GET [ str ]) Encoding format: utf-8 ($ _POST [ str ]

firewall1.1.2\使用说明.txt
.............\firewall.php
firewall1.1.2
说明.htm
下载说明.txt

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