PHP Manual . ... int dbx_compare ( array row_a, array row_b, string columnname_or_index [, int flags]) . ... This function is EXPERIMENTAL . ... Returns 0 if row_a[$columnname_or_index] is equal to row_b[$columnname_or_index], 1 if it is greater and -1 if it is smaller (or vice versa if the DBX_CMP_DESC flag is set). The flags can be set to specify comparison direction (whether sorting is ascending or descending) and comparison type (force string or numeric compare by converting the data). ...