Php/docs/function.odbc-num-rows

• PHP Manual
• ODBC 函数
• Number of rows in a result

odbc_num_rows

(PHP 4, PHP 5, PHP 7)

odbc_num_rows — Number of rows in a result

说明

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.

参数

result_id

The result identifier returned by odbc_exec().

返回值

Returns the number of rows in an ODBC result. This function will return -1 on error.

注释

Note:

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