DB_common::setFetchMode()
Synopsis
void setFetchMode (
integer $fetchmode
,
string $object_class = stdClass
)
Описание
Sets the default fetch mode used by fetch*() and get*() methods.
Parameter
-
integer
$fetchmode -
DB_FETCHMODE_ORDERED, DB_FETCHMODE_ASSOC or DB_FETCHMODE_OBJECT.
See the Examples section, below, for more information.
-
string
$object_class -
This parameter is for use when
$fetchmodeis set to DB_FETCHMODE_OBJECT.You can set this parameter to
DB_row, which then causes the resulting data to populate a new instance of a DB_row object.
Return value
void - nothing is returned on success or a DB_Error object on failure
Throws
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| NULL | invalid fetchmode mode | The given fetch mode does not exists or is not implement in your DB version. | Check writing of the argument and your used version of DB. |
Замечание
This function can not be called statically.
Пример
DB_FETCHMODE_ORDERED (default)
Causes ordered arrays to be returned. The order is taken from the select statement.
<?php
// Once you have a valid DB object named $db...
$db->setFetchMode(DB_FETCHMODE_ORDERED);
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row[0];
?>
Output:
Array
(
[0] => 28
[1] => hi
)
Column a is 28
DB_FETCHMODE_ASSOC
Makes associative arrays, with the column names as the array keys.
<?php
// Once you have a valid DB object named $db...
$db->setFetchMode(DB_FETCHMODE_ASSOC);
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row['a'];
?>
Output:
Array
(
[a] => 28
[b] => hi
)
Column a is 28
DB_FETCHMODE_OBJECT
Returns objects with column names as properties.
<?php
// Once you have a valid DB object named $db...
$db->setFetchMode(DB_FETCHMODE_OBJECT);
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row->a;
?>
Output:
stdClass Object
(
[a] => 28
[b] => hi
)
Column a is 28
DB_FETCHMODE_OBJECT and DB_row
If setFetchMode()'s optional
$object_class parameter
is set to DB_row, DB_row
objects are returned.
<?php
// Once you have a valid DB object named $db...
$db->setFetchMode(DB_FETCHMODE_OBJECT, 'DB_row');
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row->a;
?>
Output:
db_row Object
(
[a] => 28
[b] => hi
)
Column a is 28
DB_FETCHMODE_OBJECT with your own object in PHP 4
<?php
// Once you have a valid DB object named $db...
class SomeResult {
function SomeResult($data) {
foreach ($data as $key => $value) {
$this->$key = $data[$key];
}
}
}
$db->setFetchMode(DB_FETCHMODE_OBJECT, 'SomeResult');
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row->a;
?>
Output:
SomeResult Object
(
[a] => 28
[b] => hi
)
Column a is 28
DB_FETCHMODE_OBJECT with your own object in PHP 5
<?php
// Once you have a valid DB object named $db...
class SomeResult {
public $row_data;
function __construct($data) {
$this->row_data = $data;
}
function __get($variable) {
return $this->row_data[$variable];
}
}
$db->setFetchMode(DB_FETCHMODE_OBJECT, 'SomeResult');
$res =& $db->query('SELECT a, b FROM phptest WHERE a = 28');
$row =& $res->fetchRow();
print_r($row);
echo 'Column a is ' . $row->a;
?>
Output:
SomeResult Object
(
[a] => 28
[b] => hi
)
Column a is 28