(PHP 4, PHP 5, PHP 7)
odbc_num_rows — Number of rows in a result
odbc_num_rows ( resource $result_id ) : int
Gets the number of rows in a result. For INSERT, UPDATE and DELETE statements odbc_num_rows() returns the number of rows affected. For a SELECT clause this can be the number of rows available.
result_id
The result identifier returned by odbc_exec().
Returns the number of rows in an ODBC result. This function will return -1 on error.
Note:
Using odbc_num_rows() to determine the number of rows available after a SELECT will return -1 with many drivers.
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https://www.php.net/manual/en/function.odbc-num-rows.php