Returns a substring from the middle of the specified text.
midb ( text, start_num, num_bytes )
text: (Text) The text from which the substring will be extracted.
start_num: (Number) The positional index in bytes of the first byte of the substring to be returned.
num_bytes: (Number) The length in bytes of the substring to extract.
The first byte of the entire text value is considered to have an index = 1.
You can experiment with this function in the test box below.