pg_fetch_result

(PHP 4 >= 4.2.0, PHP 5)

pg_fetch_result -- Returns values from a result resource

Описание

string pg_fetch_result ( resource result, int row, mixed field )

string pg_fetch_result ( resource result, mixed field )

pg_fetch_result() returns the value of a particular row and field (column) in a PostgreSQL result resource.

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.

field

A string representing the name of the field (column) to fetch, otherwise and int representing the field number to fetch. Fields are numbered from 0 upwards.

Возвращаемые значения

Boolean is returned as "t" or "f". All other types, including arrays are returned as strings formatted in the same default PostgreSQL manner that you would see in the psql program. Database NULL values are returned as NULL.

FALSE is returned if row exceeds the number of rows in the set, or on any other error.

Примеры

Пример 1. pg_fetch_result() example

<?php
$db = pg_connect("dbname=users user=me") || die();

$res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");

$val = pg_fetch_result($res, 1, 0);

echo "First field in the second row is: ", $val, "\n";
?>

Результат выполнения данного примера:

First field in the second row is: 2

Смотрите также

pg_query()
pg_fetch_array()



pg_fetch_result
Akbar
01-Dec-2004 08:01
Use can use pg_fetch_result when getting a value (like a smallint as in this example) returned by your stored procedure

<?php
$pgConnection = pg_connect("dbname=users user=me");

$userNameToCheckFor = "metal";

$result = pg_query($pgConnection, "SELECT howManyUsersHaveThisName('$userNameToCheckFor')");

$count = pg_fetch_result($result, 0, 'howManyUsersHaveThisName');

?>
newby_AT_nobletec_DOT_com
04-Sep-2002 08:12
Comment on boolean fields:

If you retrieve a boolean value from the PostgreSQL database, be aware that the value returned will be either the character 't' or the character 'f', not an integer.  So, the statement

     if (pg_fetch_result($rsRecords,0,'blnTrueFalseField')) {
       echo "TRUE";
     } else {
       echo "FALSE";
     }

will echo "TRUE" in either case (True or False stored in the field).  In order to work as expected, do this instead:

     if (pg_fetch_result($rsRecords,0,'blnTrueFalseField') == 't') {
       echo "TRUE";
     } else {
       echo "FALSE";
     }

<pg_fetch_objectpg_fetch_row>
 Last updated: Tue, 15 Nov 2005