(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_fetch_all — 取得されたすべての行を配列として取得する
pg_fetch_all()は、 PgSql\Result インスタンスのすべての行 （レコード）を保持する配列を返します。
注意: この関数は、 NULL フィールドに PHPの
null値を設定します。
resultpg_query()、pg_query_params() や (様々な関数がありますが、特に) pg_execute() が返した PgSql\Result クラスのインスタンス。
mode
返される配列のインデックスを制御するオプションの引数です。
mode は定数で、以下の値を取ることができます。:
PGSQL_ASSOC, PGSQL_NUM, PGSQL_BOTH。
PGSQL_NUM を使うと、配列のインデックスを数値にした配列を返します。PGSQL_ASSOC を使うと、連想配列のインデックスを返します。PGSQL_BOTH を指定すると、数値と連想配列のインデックスを両方含めた形で配列を返します。
結果のすべての行を含む配列を返します。それぞれの行は、フィールド名を 添字とするフィールド値の配列です。
| バージョン | 説明 |
|---|---|
| 8.1.0 |
result は、PgSql\Result
クラスのインスタンスを期待するようになりました。
これより前のバージョンでは、リソース を期待していました。
|
| 8.0.0 |
pg_fetch_all() は
結果セットが0行の場合、false ではなく、
空の配列を返すようになりました。
|
| 7.1.0 |
mode パラメータが追加されました。
|
例1 PostgreSQL fetch all
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
$result = pg_query($conn, "SELECT * FROM authors");
if (!$result) {
echo "An error occurred.\n";
exit;
}
$arr = pg_fetch_all($result);
print_r($arr);
?>上の例の出力は、 たとえば以下のようになります。
Array
(
[0] => Array
(
[id] => 1
[name] => Fred
)
[1] => Array
(
[id] => 2
[name] => Bob
)
)
Also for those who are trying to move off oracle, pg_fetch_all returns an array with rows and columns inverted in the sense of ocifetchall. You would need to transpose this result array before your code takes the first index a column name and the second index a row index.PG functions retrieve data as strings. If you want automatic casting you need to use PDO.pg_fetch_all, despite the app note, accepts only one argument, the resultset. It does exactly what is expected, returning a two-dimensional array of the resultset. I suspect the app note given was just copied from pg_fetch_array, which is what you want to use for a single row.It seems like pg_fetch_all() only works on version 4.3.x. I tried it with 4.2.2 and it does not recognize the function, so I assume it won't work on 4 => 4.2.x.For those wondering, this function returns a two-dimentional array, the first dimension being a 0-based indexed array, the second dimension an associative. So you might access the first authors surname using $authors[0]["surname"].
Certainly this is the case in PHP 5.2.9, I can't vouch for other versions though.Be aware that pg_fetch_all() is subject to the same limitations as pg_fetch_assoc(), in that if your query returns multiple columns with the same name (or alias) then only the rightmost one will be returned in the associative array, other ones will not.
A simple example:
<?php
$res = pg_query(
"SELECT a.*, b.* -- Fetch all columns from both tables
FROM table1 AS a
LEFT OUTER JOIN table2 as b
USING (column)"
);
$rows = pg_fetch_all($res);
?>
In this example, since we're selecting columns via *, if any columns from table2 share the same names as those in table1, they will be the ones returned despite that table2 (as the optional side of an outer join) may return NULL values.
This is not a bug, just a limitation of associative arrays in general, and is easy enough to avoid by structuring your queries carefully and using column aliases to avoid confusion.If you configure in your pg_hba.conf file a connection by the md5 method and you didn't setup a password for that user, you must define a password by the "alter role" PostgreSQL command:
alter role user_name encrypted password 'user_password';
Also, if you is connecting by type TCP/IP (host) and your IP address is another than (localhost), as example (127.0.1.1) you must uncomment the following line at postgresql.conf file, adding your IP address:
listen_addresses = 'localhost,127.0.1.1'
After save the new configuration, you must restart your PostgreSQL service.For versions of PHP that don't yet support the new names or newer functions I wrote a couple functions like this one
if (! function_exists("pg_fetch_all")) {
function pg_fetch_all($res, $kind="assoc") {
$i = 0; // this is needed for the row integer in the looped pg_fetch_array
if ($kind == "assoc") {
while ($row = pg_fetch_array($res, $i, PGSQL_ASSOC)) {
$array_out[] = $row;
$i++;
}else{
while ($row = pg_fetch_array($res)) {
$array_out[] = $row;
}
}
return $array_out;
}
}