php - COUNT of sql SELECT query with LIMIT in mySQL -

In php-mysql, how does the count of rows returning within a SELECT query count?
Select something like this query:

  $ q = "Choose from users LIMIT 20,60"   
 But if the total number was just for example 55, the result is 20 to 55 users with 20 to 40 total users! 
 How can I get number 35 without asking DB twice? 
 I am doing this now:  
  $ q = "Select COUNT (*) users limit of 20, 60"; $ Result = mysqli_query ($ db_connection, $ 1); $ Count = mysqli_fetch_row ($ result); $ Count = $ count [0];   
 But here I am interrogating DB twice and I think it is not very good. 
 I know that I can have the total number of rows without regard to  LIMIT ,  using SQL_CALC_FOUND_ROWS  and  FOUND_ROWS ()  , But this is not my case, because I want to consider the  LIMIT  Thanks!   
 
 
 you want  
  $ count = $ result- & gt; ; NUM_ROWS;