pg_execute
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?
$array = pg_fetch_all_columns($result, 2);
// Won't work, must use a column number instead of its name
$array = pg_fetch_all_columns($result, 'birthday');
// Works
$array = pg_fetch_all_columns($result, pg_field_num($result, 'birthday'));
?>
pg_fetch_all_columns
(PHP 5 >= 5.1.0)
pg_fetch_all_columns — Fetches all rows in a particular result column as an array
Descrierea
array pg_fetch_all_columns
( resource $result
[, int $column = 0
] )
pg_fetch_all_columns() returns an array that contains all rows (records) in a particular column of the result resource.
Notă: Această funcţie stabileşte câmpurile NULL la valoarea PHP NULL.
Parametri
- 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.
Valorile întroarse
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.
Exemple
Example #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
$arr = pg_fetch_all_columns($result, 1);
var_dump($arr);
?>
add a note
User Contributed Notespg_fetch_all_columns
strata_ranger at hotmail dot com
05-Apr-2009 02:43
05-Apr-2009 02:43
massiv at nerdshack dot com
22-Oct-2008 12:56
22-Oct-2008 12:56
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);
?>