问题： Uncaught InvalidArgumentException: Malformed UTF-8 characters, possibly incorrectly encoded in
The data returned is of special characters, encoding conversion back just fine
mb_convert_encoding($value, 'UTF-8', 'UTF-8');
Chinese distortion can be transcoded by the following method
$content = mb_convert_encoding( $result, 'UTF-8', 'UTF-8,GBK,GB2312,BIG5' );
Means that the UTF-8, GBK, GB2312, BIG5 encoding these types transformed into UTF-8 encoding.
