Returns the number of fields contained in a result set


(PECL ibm_db2 >= 1.0.0)

db2_num_fields Returns the number of fields contained in a result set

Описание

int db2_num_fields ( resource $stmt )

Returns the number of fields contained in a result set. This is most useful for handling the result sets returned by dynamically generated queries, or for result sets returned by stored procedures, where your application cannot otherwise know how to retrieve and use the results.

Список параметров

stmt

A valid statement resource containing a result set.

Возвращаемые значения

Returns an integer value representing the number of fields in the result set associated with the specified statement resource. Returns FALSE if the statement resource is not a valid input value.

Примеры

Пример #1 Retrieving the number of fields in a result set

The following example demonstrates how to retrieve the number of fields returned in a result set.

<?php

$sql 
"SELECT id, name, breed, weight FROM animals ORDER BY breed";
$stmt db2_prepare($conn$sql);
db2_execute($stmt$sql);
$columns db2_num_fields($stmt);

echo 
"There are {$columns} columns in the result set.";
?>

Результат выполнения данного примера:

 There are 4 columns in the result set. 

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