PHP Session + MySQL资源 [英] PHP Session + MySQL resource

问题描述

是否可以将mysql资源分配给$ _SESSION变量?

Is it possible to give a mysql resource to a $_SESSION variable ?

//mysqldb.inc.php
class mySqlDb
{
    private $link;

    public function __construct($_host = '', $_db = '', $_user = '', $_pwd = '')
    {
           $link = mysql_pconnect(...);
    }

    public function query($data)
    {
           $r = mysql_query($data, $this->link);
           return $r;
    }
}


//index.php
session_start();
include_once('mysqldb.inc.php');

$sqlobj = new mySqlDb();
$sqlobj->dbconnect($db_host, $db_name, $db_user, $db_pwd);
$_SESSION['mysqldb'] = $sqlobj;


//check.php
session_start();
include_once('mysqldb.inc.php');

$sqlobj = $_SESSION['mysqldb'];
$sqlobj->query(...);

$sqlobj->query(...)返回

致命错误:main():脚本试图执行方法或访问不完整对象的属性.请确保在之前调用unserialize()之前调用了您要操作的对象的类定义"mySqlDb"，或提供了__autoload()函数以将类定义加载到D:\ apache中\ www \ check.php，第4行`

Fatal error: main(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "mySqlDb" of the object you are trying to operate on was loaded before unserialize() gets called or provide a __autoload() function to load the class definition in D:\apache\www\check.php on line 4`

如果我使用$_SESSION['mysqldb'] = serialize($sqlobj)和$sqlobj = unserialize($_SESSION['mysqldb'])，则会出现此错误:

If I use $_SESSION['mysqldb'] = serialize($sqlobj) and $sqlobj = unserialize($_SESSION['mysqldb']) I have this error:

警告:mysql_query()期望参数2为资源，在D:\ apache \ www \ mysqldb.inc.php中给定的整数...

Warning: mysql_query() expects parameter 2 to be resource, integer given in D:\apache\www\mysqldb.inc.php on line ...

推荐答案

您无法保留php资源.

You cannot persist php resources.

就是这样-您只是不能.因此，您每次都需要连接到数据库.

That's it - you just cannot. So you need to connect to database each time.

$_SESSION文档注释:

由于会话数据已序列化，因此资源变量无法存储在会话中.

Because session data is serialized, resource variables cannot be stored in the session.

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