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<?php var_dump( $conv = mb_convert_encoding( $bin = hex2bin("ffb383"), "UTF-8", "GB18030" ), mb_check_encoding($bin, "GB18030"), bin2hex(mb_convert_encoding($conv, "GB18030", "UTF-8")) );
Output for git.master, git.master_jit, rfc.property-hooks
string(4) "?硟" bool(false) string(6) "3fb383"

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