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# db2_num_fields

(PECL)

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

## Descrizione

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.

## Elenco dei parametri

stmt

  A valid statement resource containing a result set.

## Valori restituiti

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.

## Esempi

Esempio 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."; ?>`

Il precedente esempio visualizzerà:

    There are 4 columns in the result set.

## Vedere anche:

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

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db2_next_result | Risali | db2_num_rows