How to Get The Count or The Number Of Rows In A Result Set In PHP using ODBC Connection?

Question

While I build a web page in My PHP web application, My Connection works ok but When I want to get the count of rows of the SELECT Statement I used in my query, It gives me -

Answer 1

odbc_num_rows seems to be reliable for INSERT, UPDATE, and DELETE queries only.

The manual says:

Using odbc_num_rows() to determine the number of rows available after a SELECT will return -1 with many drivers.

one way around this behaviour is to do a COUNT(*) in SQL instead. See here for an example.