PHP kézikönyv
Előző |  | Következő

# db2_num_fields

(PECL)

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

## Leírás

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.

## Paraméterek

stmt

  A valid statement resource containing a result set.

## Visszatérési értékek

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.

## Példák

Példa 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."; ?>`
A fenti példa a következő kimenetet adja:
    There are 4 columns in the result set.

## Lásd még

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

Előző | Tartalom | Következő
db2_next_result | Fel | db2_num_rows