db2_next_result
db2_num_rows
IBM DB2 Funkcje
PHP Manual

# db2_num_fields

(PECL ibm_db2 >= 1.0.0)

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.

### Zobacz też:

- db2_execute() - Executes a prepared SQL statement
- db2_field_display_size() - Returns the maximum number of bytes required to display a column
- db2_field_name() - Returns the name of the column in the result set
- db2_field_num() - Returns the position of the named column in a result set
- db2_field_precision() - Returns the precision of the indicated column in a result set
- db2_field_scale() - Returns the scale of the indicated column in a result set
- db2_field_type() - Returns the data type of the indicated column in a result set
- db2_field_width() - Returns the width of the current value of the indicated column in a result set

db2_next_result
db2_num_rows
IBM DB2 Funkcje
PHP Manual