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# pg_fetch_array

(PHP 3 >= 3.0.1, PHP 4, PHP 5)

pg_fetch_array -- Fetch a row as an array

## Description

array pg_fetch_array ( resource result [, int row [, int result_type]] )

pg_fetch_array() returns an array that corresponds to the fetched row (record).

pg_fetch_array() is an extended version of pg_fetch_row(). In addition to storing the data in the numeric indices (field number) to the result array, it can also store the data using associative indices (field name). It stores both indicies by default.

> 注: This function sets NULL fields to PHP `NULL` value.

pg_fetch_array() is NOT significantly slower than using pg_fetch_row(), and is significantly easier to use.

> 注: row became optional in PHP 4.1.0.

> 注: result_type was added in PHP 4.0.0.

## Parameters

result

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

row

  Row number in result to fetch. Rows are numbered from 0 upwards. If omitted, next row is fetched.

result_type

  An optional parameter that controls how the returned array is indexed. result_type is a constant and can take the following values: `PGSQL_ASSOC`, `PGSQL_NUM` and `PGSQL_BOTH`. Using `PGSQL_NUM`, pg_fetch_array() will return an array with numerical indices, using `PGSQL_ASSOC` it will return only associative indices while `PGSQL_BOTH`, the default, will return both numerical and associative indices.

## Return Values

An array indexed numerically (beginning with 0) or associatively (indexed by field name), or both. Each value in the array is represented as a string. Database NULL values are returned as `NULL`.

`FALSE` is returned if row exceeds the number of rows in the set, there are no more rows, or on any other error.

## �d��

範例 1. pg_fetch_array() example

`<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occured.\n";
exit;
}
$result = pg_query($conn, "SELECT author, email FROM authors");
if (!$result) {
echo "An error occured.\n";
exit;
}
$arr = pg_fetch_array($result, 0, PGSQL_NUM);
echo $arr[0] . " <- Row 1 Author\n";
echo $arr[1] . " <- Row 1 E-mail\n";
// As of PHP 4.1.0, the row parameter is optional; NULL can be passed instead,
// to pass a result_type. Successive calls to pg_fetch_array will return the
// next row.
$arr = pg_fetch_array($result, NULL, PGSQL_ASSOC);
echo $arr["author"] . " <- Row 2 Author\n";
echo $arr["email"] . " <- Row 2 E-mail\n";
$arr = pg_fetch_array($result);
echo $arr["author"] . " <- Row 3 Author\n";
echo $arr[1] . " <- Row 3 E-mail\n";
?>`

## �Ѧ�

pg_fetch_row()
pg_fetch_object()
pg_fetch_result()

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