PHP 8.4.0 RC2 available for testing

pg_fetch_all

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

pg_fetch_all从结果中获取所有行作为数组

说明

pg_fetch_all(PgSql\Result $result, int $mode = PGSQL_ASSOC): array

pg_fetch_all() 返回包含 PgSql\Result 实例中所有行(记录)的数组。

注意: 此函数将 NULL 字段设置为 PHP null 值。

参数

result

PgSql\Result 实例,由 pg_query()pg_query_params() 或者 pg_execute()(等)返回。

mode

An optional parameter that controls how the returned array is indexed. mode is a constant and can take the following values: PGSQL_ASSOC, PGSQL_NUM and PGSQL_BOTH. Using PGSQL_NUM, the function will return an array with numerical indices, using PGSQL_ASSOC it will return only associative indices while PGSQL_BOTH will return both numerical and associative indices.

返回值

包含结果中所有行的 array。每行都是一个由字段名作为索引的字段值数组。

更新日志

版本 说明
8.1.0 现在 result 参数接受 PgSql\Result 实例,之前接受 resource
8.0.0 对于零行的结果集,pg_fetch_all() 现在将返回一个空数组而不是 array
7.1.0 新增 mode 参数。

示例

示例 #1 PostgreSQL 获取全部

<?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);

?>

以上示例的输出类似于:

Array
(
    [0] => Array
        (
            [id] => 1
            [name] => Fred
        )

    [1] => Array
        (
            [id] => 2
            [name] => Bob
        )

)

参见

add a note

User Contributed Notes 9 notes

up
3
Anonymous
21 years ago
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.
up
0
ilhan at ilhan dot name
8 years ago
PG functions retrieve data as strings. If you want automatic casting you need to use PDO.
up
-2
jcomeau at whatisthewww dot com
21 years ago
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.
up
-1
tasmanian at devil dot com
21 years ago
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.
up
-1
prefer_not_to at say dot com
15 years ago
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.
up
-3
strata_ranger at hotmail dot com
15 years ago
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.
up
-3
viniciusweb at gmail dot com
19 years ago
This function returns NULL if the parameter is false.
up
-4
humbertoibanez at gmail dot com
8 years ago
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.
up
-4
php dot net at mechintosh dot com
21 years ago
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;
}
}
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