ovrimos_field_len
    (PHP 4 >= 4.0.3, PHP 5)
ovrimos_field_len -- Returns the length of the output column
Description
int 
ovrimos_field_len ( int result_id, int field_number)
     ovrimos_field_len() is used to get the length
     of the output column with number field_number
     (1-based), in result result_id.