cubrid_num_rows

(PECL CUBRID >= 8.3.0)

cubrid_num_rows — Get the number of rows in the result set

说明

cubrid_num_rows ( resource $result ) : int

The cubrid_num_rows() function is used to get the number of rows from the query result. You can use it only when the query executed is a select statement. When you want to know such value for INSERT, UPDATE, or DELETE query, you have to use the cubrid_affected_rows() function.

Note: The cubrid_num_rows() function can only be used for synchronous query; it returns 0 when it is used for asynchronous query.

参数

result

result comes from a call to cubrid_execute(), cubrid_query() and cubrid_prepare()

返回值

Number of rows, when process is successful.

0 when the query was done in async mode.

-1, if SQL statement is not SELECT.

false when process is unsuccessful.

范例

示例 #1 cubrid_num_rows() example

<?php
$conn = cubrid_connect("localhost", 33000, "demodb", "dba");

$req = cubrid_execute($conn, "SELECT * FROM code");

$row_num = cubrid_num_rows($req);
$col_num = cubrid_num_cols($req);

printf("Row Num: %d\nColumn Num: %d\n", $row_num, $col_num);

cubrid_disconnect($conn);
?>

以上例程会输出：

Row Num: 6
Column Num: 2

参见