PHP Manual
CUBRID MySQL 兼容性函数
Return the number of columns in the result set

cubrid_num_fields

(PECL CUBRID >= 8.3.0)

cubrid_num_fields — Return the number of columns in the result set

说明

cubrid_num_fields ( resource $result ) : int

This function returns the number of columns in the result set, on success, or it returns FALSE on failure.

参数

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

返回值

Number of columns, on success.

-1 if SQL sentence is not SELECT.

FALSE when process is unsuccessful.

范例

Example #1 cubrid_num_fields() example

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

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

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

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