# pg_fetch_all_columns

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

pg_fetch_all_columns — Fetches all rows in a particular result column as an array

### Descripción

pg_fetch_all_columns(PgSql\Result `$result`, int `$field` = 0): array

pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the PgSql\Result instance.

> Nota: Esta función define campos NULOS al valor `null` de PHP.

### Parámetros

`result`

  An PgSql\Result instance, returned by pg_query(), pg_query_params() or pg_execute()(among others).

`field`

  Column number. Defaults to the first column if not specified.

### Valores devueltos

An array with all values in the result column.

### Historial de cambios

Versión | Descripción
--- | ---
8.1.0 | The `result` parameter expects an PgSql\Result instance now; previously, a recurso was expected.

### Ejemplos

Ejemplo #1 pg_fetch_all_columns() example

`<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
$result = pg_query($conn, "SELECT title, name, address FROM authors");
if (!$result) {
echo "An error occurred.\n";
exit;
}
// Get an array of all author names
$arr = pg_fetch_all_columns($result, 1);
var_dump($arr);
?>`

### Ver también

- pg_fetch_all() - Obtiene todas las filas de un resultado como un array