pg_fetch_all_columns

(PHP 5 >= 5.1.0)

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

Описание

array pg_fetch_all_columns ( resource $result [, int $column ] )

pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the result resource.

Замечание: Эта функция устанавливает NULL-поля в значение NULL PHP.

Список параметров

result

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

column

Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified.

Возвращаемые значения

An array with all values in the result column.

FALSE is returned if column is larger than the number of columns in the result, or on any other error.

Примеры

Пример #1 pg_fetch_all_columns() example

<?php 
$conn 
pg_pconnect("dbname=publisher");
if (!
$conn) {
  echo 
"An error occured.\n";
  exit;
}

$result pg_query($conn"SELECT title, name, address FROM authors");
if (!
$result) {
  echo 
"An error occured.\n";
  exit;
}

// Get an array of all author names
$arr pg_fetch_all_columns($result1);

var_dump($arr);

?>

Смотрите также

Коментарии

php 4 equivalent:

<?php 
$conn 
pg_pconnect("dbname=publisher");
if (!
$conn) {
  echo 
"An error occured.\n";
  exit;
}

$result pg_query($conn"SELECT title, name, address FROM authors");
if (!
$result) {
  echo 
"An error occured.\n";
  exit;
}

// Get an array of all author names
$arr = array();
while (
$line pg_fetch_array($result)) {
 
array_push($arr$line['name']);
}

var_dump($arr);

?>
2008-10-22 08:56:42
http://php5.kiev.ua/manual/ru/function.pg-fetch-all-columns.html
Unfortunate that pg_fetch_all_columns() doesn't support fetching a column by its name -- if you want to do that, you'll need to use pg_field_num() as an intermediary:

For example:

<?php

if ($foo)
 
$cols "email_address";

else
 
$cols "last_name, middle_init";

$result pg_query("Select first_name, $info, birthday from users_table");

// Problem -- does column #2 refer to the 'birthday' or 'middle_init' field?
$array pg_fetch_all_columns($result2);

// Won't work, must use a column number instead of its name
$array pg_fetch_all_columns($result'birthday');

// Works
$array pg_fetch_all_columns($resultpg_field_num($result'birthday'));

?>
2009-04-04 21:43:39
http://php5.kiev.ua/manual/ru/function.pg-fetch-all-columns.html
pg_fetch_all_columns() returns array (empty array) even if the result set in empty (while pg_fetch_all() returns FALSE when the result set is empty)

<?
$result 
pg_query("
    SELECT 'something'
    WHERE 1 = 2
"
);
var_dumppg_fetch_all($result) ); // boolean false
var_dumppg_fetch_all_columns($result) ); // array(0){}
?>
2013-11-21 13:48:19
http://php5.kiev.ua/manual/ru/function.pg-fetch-all-columns.html

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