<?php mb_internal_encoding('ISO-2022-JP'); var_dump( mb_decode_mimeheader( mb_encode_mimeheader( mb_convert_encoding( "あいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやいゆえよらりるれろわゐうゑをん", "ISO-2022-JP", "UTF-8" ), "ISO-2022-JP" ) ) );
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