(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_fetch_all — Fetches all rows from a result as an array
pg_fetch_all() returns an array that contains all rows (records) in the PgSql\Result instance.
Note: This function sets NULL fields to the PHP
nullvalue.
resultAn PgSql\Result instance, returned by pg_query() , pg_query_params() or pg_execute() (among others).
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.
An array with all rows in the result. Each row is an array of field values indexed by field name.
| Version | Description |
|---|---|
| 8.1.0 |
The result parameter expects an PgSql\Result
instance now; previously, a resource was expected.
|
| 8.0.0 |
pg_fetch_all() will now return an empty array
instead of false for result sets with zero rows.
|
| 7.1.0 |
The mode parameter was added.
|
Example #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);
?>The above example will output something similar to:
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;
}
}