pg_fetch_all
Hopefully most people realize this on their own, but the examples below where people tried to get creative with getting numerical or associative (not both) keys in the result are rather pointless. See the pg_fetch_assoc() and pg_fetch_row() for the built in functions that do this automatically. It's generally a better idea to use one of these other functions unless you *need* to access fields by both collumn name *and* index.
pg_Fetch_Array
(PHP 4, PHP 5)
pg_Fetch_Array — obtiene una fila en la forma de un array
Descripción
array pg_fetch_array
( int $result
, int $row
[, int $result_type
] )
Devuelve: Un array que se corresponde con la fila obtenida, o FALSE si no hay más filas.
pg_fetch_array() es una versión extendida de pg_fetch_row(). Además de almacenar los datos en los índices numericos del array resultante, también almacena los datos usando índices asociativos, empleando para ello el nombre del campo como la llave o índice.
El tercer parámetro opcional result_type en pg_fetch_array() es una constante y puede tomar cualquiera de los siguientes valores: PGSQL_ASSOC, PGSQL_NUM, y PGSQL_BOTH.
Note: Result_type se añadio en PHP 4.0.
Una cosa importante a tener en cuenta es que usar pg_fetch_array() NO es significativamente más lento que usar pg_fetch_row(), y sin embargo el valor añadido que aporta sí lo es.
Para más detalles, ver pg_fetch_row()
Example #1 PostgreSQL fetch array
<?php
$conn = pg_pconnect("","","","","publisher");
if (!$conn) {
echo "An error occured.\n";
exit;
}
$result = pg_Exec ($conn, "SELECT * FROM authors");
if (!$result) {
echo "An error occured.\n";
exit;
}
$arr = pg_fetch_array ($result, 0);
echo $arr[0] . " <- array\n";
$arr = pg_fetch_array ($result, 1);
echo $arr["author"] . " <- array\n";
?>
add a note
User Contributed Notespg_Fetch_Array
anonymous
13-May-2005 11:21
13-May-2005 11:21
Dave O
22-Feb-2005 06:52
22-Feb-2005 06:52
I found this out through help from the mailing lists. If you need to reset the internal counter, use the pg_result_seek, similar to:
pg_result_seek($result, 0)
...plagiarized from the comment on the function's doc page.
devnull
02-Feb-2005 10:59
02-Feb-2005 10:59
In response to eth0's comment below about SELECT'ing from two tables where the tables have columns with the same names, you can get around this problem like this:
"SELECT table1.foo AS foo1, table2.foo AS foo2 FROM table1, table2"
In the associative array returned, the keys will be "foo1" and "foo2".
enyo at www.red-link.com
15-Sep-2003 03:55
15-Sep-2003 03:55
Just because it is not really clear how to specify the result type, I poste this message.
I wrote a wrapper function which looks like this:
<?php
function db_fetch_array ($result, $row = NULL, $result_type = PGSQL_ASSOC)
{
$return = @pg_fetch_array ($result, $row, $result_type);
return $return;
}
?>
I think this way it is quite comfortable to get the arrays you want.
akm at e-nterart dot pl
17-Jun-2003 06:45
17-Jun-2003 06:45
(Timesaver) Be aware of the fact that keys in array returned by this function are (well, at least as of 4.2.3) of the same case as SQL column names (e.g. if your column name is ID then key name is also ID, not id or Id), and the keys in associative array are CASE SENSITIVE!!! So don't be surprised if you get unexpected results. Double check SQL column names and the key names.
jesse at sokieserv dot dhs dot org
13-Dec-2001 01:38
13-Dec-2001 01:38
As of PHP 4.1.0, you can now use code such as the following to iterate through a result set:
$conn = pg_connect("host=localhost dbname=whatever");
$result = pg_exec($conn, "select * from table");
while ($row = pg_fetch_array($result))
{
echo "data: ".$row["data"];
}
Can be a nice little time saver, PHP with MySQL has supported this for a while but I'm glad to see it extended to PostgreSQL...
eth0 at fins
28-Sep-2001 08:15
28-Sep-2001 08:15
Please remember that if you have for example a table Customers with "cust_ID", "name" and "address" and another table Users with "u_ID","name" and "other" and then you SELECT WHERE cust_ID=u_ID then you'll get in the result array ONLY ONE "name" field, precisely the last one resulted from the select!!!
elliot at nospam dot rightnowtech dot com
23-Jul-2001 06:50
23-Jul-2001 06:50
Just remember when you 'or die' to close your table(s) or you may get a confused look from non-internet explorer users.
mkb at ele dot uri dot edu
28-Mar-2001 02:52
28-Mar-2001 02:52
The column names if you use PGSQL_ASSOC or PGSQL_BOTH are always in lowercase, no matter what the name is in the database or in the query.
gherson at snet dot net
06-Mar-2001 07:30
06-Mar-2001 07:30
In addition to returning "false if there are no more rows", pg_fetch_array will also trigger an E_WARNING. You can temporarily turn that error reporting level off and suck out all your data like so:
<?php
$errRptLvl = error_reporting();
error_reporting($errRptLvl & ~(E_WARNING));
list($i,$j)=array(0,0);
while ($selection[$i++] = $this->fetchArray($j++)); // (fetchArray is a pg_fetch_array wrapper.)
error_reporting($errRptLvl); // Restore error reporting level.
unset($selection[$i-1]); // Delete the last, empty row.
return $selection;
?>
gherson at snet dot net
03-Jan-2001 06:14
03-Jan-2001 06:14
PGSQL_BOTH is the default, meaning your array size will be doubled.
If you specify this field (result type), include no quotes around it or you won't get any data, not even an error.
Here's my wrapper function:
function SQL_fetch_array($result_ndx, $row, $result_type=PGSQL_ASSOC) {
return pg_fetch_array($result_ndx, $row, $result_type);