IBM DB2 Funktionen
PHP-Handbuch

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