pg_meta_data
pg_num_rows
PostgreSQL Functions
PHP Manual

# pg_num_fields

(PHP 4 >= 4.2.0, PHP 5)

pg_num_fields — Returns the number of fields in a result

### Descripción

int pg_num_fields ( resource `$result` )

pg_num_fields() returns the number of fields (columns) in a PostgreSQL result resource.

> Note: This function used to be called pg_numfields().

### Lista de parámetros

`result`

  PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).

### Valores retornados

The number of fields (columns) in the result. On error, -1 is returned.

### Ejemplos

Example #1 pg_num_fields() example

`<?php
$result = pg_query($conn, "SELECT 1, 2");
$num = pg_num_fields($result);
echo $num . " field(s) returned.\n";
?>`

El resultado del ejemplo seria:

    2 field(s) returned.

### Ver también

- pg_num_rows() - Returns the number of rows in a result
- pg_affected_rows() - Returns number of affected records (tuples)

pg_meta_data
pg_num_rows
PostgreSQL Functions
PHP Manual