探讨如何把session存入数据库_php技巧
php的session默认的情况下是采用的文件方式来保存的,我们在php的配制文件php.ini中可以看到这样的一行,session.save_handler="files",这样的意思就是采用文件来保存session 的,要采用数据库来保存的话,我们需要修改成拥护模式,改称 session.save_handler="use"就可以了,但是,这仅仅是说明我门没有采用文件的方式存储session,我们还要选择数据库和建立数据库的表。
建立数据库和数据库的表结构,我们可以采用php可以使用的任何的数据库,因为php和mysql的结合最好,我就使用mysql来做事例,当然根据你的需要可以改称别的数据库,同时因为mysql没有事物的功能,这也比别的数据库更快,然而保存session 书、一 不许要事物处理的,再者里我决的更好。
创建数据库:
CREATE DATABASE 'session'; 创建表结构 CREATE TABLE 'session'( id CHAR(30) NOT NULL , 'user 'CHAR(30), data CHAR(3000) ,PARMIRY BY ('id') );
下面我们来编写保存session的文件session_start.php
$con =mysql_connection("127.0.0.1","user" , "pass");
mysql_select_db("session");
function open($save_path, $session_name)
{
return(true);
}
function close()
{
return(true);
}
function read($id)
{
if($result = mysql_query("SELECT * FROM session WHERE id='$id'"))
{
if($row = mysql_felth_row($result ))
{ return $row["data"]; }
}
else
{
return "";
}
}
function write($id, $sess_data)
{
if($result = mysql_query("UPDATE session SET data='$sess_data' WHERE id='$id'"))
{
return true;
}
else
{
return false;
}
}
function destroy($id)
{
if($result = mysql_query("DELETE * FROM session WHERE id='$id'"))
{
return true;
}
else
{
return false;
}
}
/*********************************************
* WARNING - You will need to implement some *
* sort of garbage collection routine here. *
*********************************************/
function gc($maxlifetime)
{
return true;
}
session_set_save_handler("open", "close", "read", "write", "destroy", "gc");
session_start();
// proceed to use sessions normally
?>
现在我们的工作就已经完成了,只要你在需要在使用session的时候,把session_user_start.php。包含进来,
注意,这个文件一定要在文件的第一行包含,然后就想使用文件的session一样的方法使用旧可以了。

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