pg_fetch_array

Manuál PHP
Předcházející		Další

pg_fetch_array

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

pg_fetch_array -- Fetch a row as an array

Popis

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.

Poznámka: Tato funkce nastavuje pole s hodnotou NULL na hodnotu PHP NULL.

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

Poznámka: row became optional in PHP 4.1.0.

Poznámka: result_type was added in PHP 4.0.0.

Seznam parametrů

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.

Návratové hodnoty

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.

Příklady

Příklad 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";

?>

Viz také

pg_fetch_row()

pg_fetch_object()

pg_fetch_result()

Tools

Sonstiges

Předcházející	Domů	Další
pg_fetch_all	Nahoru