PHP. Руководство по PHP. 2005

pg_fetch_array

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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

Описание

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.

Замечание: Эта функция устанавливает NULL-поля

в значение NULL PHP.

pg_fetch_array() is NOT significantly

slower than using pg_fetch_row(), and

is significantly easier to use.

Замечание:

row became optional in PHP 4.1.0.

Список параметров

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.

Возвращаемые значения

An array indexed numerically (beginning with 0) or

associatively (indexed by field name), or both.

Each value in the array is represented as a

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.

Примеры

Пример 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";

?>

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PHP. Руководство по PHP. 2005

pg_fetch_array

Описание

Список параметров

Возвращаемые значения

Примеры

Смотрите также