mysql_field_name returns the name of the specified field index.
The result resource that is being evaluated. This result comes from a call to mysql_query.
The numerical field offset. The field_offset starts at 0. If field_offset does not exist, an error of level E_WARNING is also issued.
The name of the specified field index on success or false on failure.
Field names returned by this function are case-sensitive.
For backward compatibility, the following deprecated alias may be used: mysql_fieldname