mysqli_result::fetch_fields
Make sure to specify the full namespace for the "string $class_name" parameter and not a partial one, as it won't find it. For example:
<?php
namespace Root(backslash)FirstLevel
{
public static function Test($result)
{
return mysqli_fetch_object($result, 'SecondLevel\\MyClass');
}
}
?>
... will not work but this will:
<?php
namespace Root(backslash)FirstLevel
{
public static function Test($result)
{
return mysqli_fetch_object($result, 'Root\\FirstLevel\\SecondLevel\\MyClass');
}
}
?>
mysqli_result::fetch_object
mysqli_fetch_object
(PHP 5)
mysqli_result::fetch_object -- mysqli_fetch_object — Returns the current row of a result set as an object
Описание
Объектно-ориентированный стиль
object mysqli_result::fetch_object
([ string
$class_name
[, array $params
]] )Процедурный стиль
The mysqli_fetch_object() will return the current row result set as an object where the attributes of the object represent the names of the fields found within the result set.
Note that mysqli_fetch_object() sets the properties of the object before calling the object constructor.
Список параметров
-
result -
Только для процедурного стиля: Идентификатор результата запроса, полученный с помощью mysqli_query(), mysqli_store_result() или mysqli_use_result().
-
class_name -
The name of the class to instantiate, set the properties of and return. If not specified, a stdClass object is returned.
-
params -
An optional array of parameters to pass to the constructor for
class_nameobjects.
Возвращаемые значения
Returns an object with string properties that corresponds to the fetched
row or NULL if there are no more rows in resultset.
Замечание: Имена полей, возвращаемые этой функцией являются регистро-зависимыми.
Замечание: Эта функция устанавливает NULL-поля в значение
NULLPHP.
Список изменений
| Версия | Описание |
|---|---|
| 5.0.0 | Added the ability to return as a different object. |
Примеры
Пример #1 Объектно-ориентированный стиль
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 50,5";
if ($result = $mysqli->query($query)) {
/* fetch object array */
while ($obj = $result->fetch_object()) {
printf ("%s (%s)\n", $obj->Name, $obj->CountryCode);
}
/* free result set */
$result->close();
}
/* close connection */
$mysqli->close();
?>
Пример #2 Процедурный стиль
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, CountryCode FROM City ORDER by ID DESC LIMIT 50,5";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($obj = mysqli_fetch_object($result)) {
printf ("%s (%s)\n", $obj->Name, $obj->CountryCode);
}
/* free result set */
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
Результат выполнения данных примеров:
Pueblo (USA) Arvada (USA) Cape Coral (USA) Green Bay (USA) Santa Clara (USA)
Смотрите также
- mysqli_fetch_array() - Fetch a result row as an associative, a numeric array, or both
- mysqli_fetch_assoc() - Извлекает результирующий ряд в виде ассоциативного массива
- mysqli_fetch_row() - Get a result row as an enumerated array
- mysqli_query() - Performs a query on the database
- mysqli_data_seek() - Adjusts the result pointer to an arbitary row in the result
add a note
User Contributed Notes
mysqli_result::fetch_object
Alex
27-Jan-2012 04:36
benpptung at tacol dot biz
08-Aug-2009 08:04
I don't know why no one talk about this.
fetch_object is very powerful since you can instantiate an Object which has the methods you wanna have.
You can try like this..
<?php
class PowerfulVO extends AbstractWhatEver {
public $field1;
private $field2; // note : private is ok
public function method(){
// method in this class
}
}
$sql = "SELECT * FROM table ..."
$mysqli = new mysqli(........);
$result = $mysqli->query($sql);
$vo = $result->fetch_object('PowerfulVO');
?>
Note : if the field is not defined in the class, fetch_object will add this field for you as public.
The method is very powerful, especially if you want to use a VO design pattern or class mapping feature with Flex Remoting Object( Of course, you need to have ZendAMF or AMFPHP ..framework)
Hope this help and open new possibilities for you
peterbelm at g[oogle]mail dot com
18-Aug-2008 07:10
If your SQL code selects columns with empty names like so:
SELECT id as ``...
You will get a fatal error "Cannot access empty property", this took me a while to track down!
Obviously your SQL really shouldn't do that, and should be fixed but I'm going to submit a feature request to ask for a better error message for that.