PHP Handbuch
Zurück |  | Weiter

# db2_num_fields

(PECL)

db2_num_fields -- Returns the number of fields contained in a result set

## Beschreibung

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.

## Parameter Liste

stmt

  A valid statement resource containing a result set.

## Rückgabewerte

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.

## Beispiele

Beispiel 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."; ?>`

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

    There are 4 columns in the result set.

## Siehe auch

db2_execute()
db2_field_display_size()
db2_field_name()
db2_field_num()
db2_field_precision()
db2_field_scale()
db2_field_type()
db2_field_width()

Zurück | Zum Anfang | Weiter
db2_next_result | Nach oben | db2_num_rows