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<?php $backslash_and_tilde = "~\\"; $sjis2004_backslash_and_tilde = mb_convert_encoding($backslash_and_tilde, "SJIS-2004", "UTF-8"); var_dump( bin2hex($sjis2004_backslash_and_tilde), $re_convert = mb_convert_encoding($sjis2004_backslash_and_tilde, "UTF-8", "SJIS-2004"), bin2hex($re_convert) );

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33.69 ms | 406 KiB | 5 Q