MySQLi_Result
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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

说明

面向对象风格

object mysqli_result::fetch_object ([ string $class_name [, array $params ]] )

过程化风格

object mysqli_fetch_object ( mysqli_result $result [, string $class_name [, array $params ]] )

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.

参数

result

仅以过程化样式：由 mysqli_query()，mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识。

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_name objects.

返回值

Returns an object with string properties that corresponds to the fetched row or NULL if there are no more rows in resultset.

Note: 此函数返回的字段名大小写敏感。

Note: 此函数将 NULL 字段设置为 PHP NULL 值。

更新日志

版本 说明
5.0.0 Added the ability to return as a different object.

范例

Example #1 面向对象风格

<?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();
?>

Example #2 过程化风格

<?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);
?>

以上例程会输出：

Pueblo (USA)
Arvada (USA)
Cape Coral (USA)
Green Bay (USA)
Santa Clara (USA)

参见

MySQLi_Result
在线手册：中文 英文
PHP手册
PHP手册 - N: Returns the current row of a result set as an object

用户评论:

Alex (27-Jan-2012 12:36)

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');
    }
}

?>

benpptung at tacol dot biz (09-Aug-2009 04:04)

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 03:10)

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.