character encoding of variables vars in
encoding from_encoding to encoding
to_encoding. It returns character encoding
before conversion for success,
FALSE for failure.
mb_convert_variables() join strings in Array or Object to detect encoding, since encoding detection tends to fail for short strings. Therefore, it is impossible to mix encoding in single array or object.
It from_encoding is specified by
array or comma separated string, it tries to detect encoding from
encoding is omitted,
detect_order is used.
vars (3rd and larger) is reference to variable to be converted. String, Array and Object are accepted. mb_convert_variables() assumes all parameters have the same encoding.