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<?php var_dump( $conv = mb_convert_encoding( $bin = hex2bin("0001f1e8"), "UTF-8-Mobile#KDDI-A", "UCS-4BE" ), mb_check_encoding($bin, "UTF-8-Mobile#KDDI-A"), bin2hex(mb_convert_encoding($conv, "UTF-8-Mobile#KDDI-A", "UTF-8")) );
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31.74 ms | 408 KiB | 5 Q