Podręcznik PHP
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# db2_num_fields

(PECL)

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

## Opis

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.

## Parametry

stmt

  A valid statement resource containing a result set.

## Zwracane wartości

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.

## Przykłady

Przykład 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."; ?>`

Powyższy przykład wyświetli:

    There are 4 columns in the result set.

## Patrz także

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

Poprzedni | Spis treści | Następny
db2_next_result | Początek rozdziału | db2_num_rows