作者:政平世财482 | 来源:互联网 | 2018-03-22 22:45
session保存在mysql db = &$db;
session_module_name('user');
session_set_save_handler(
array(&$this, 'open'),
array(&$this, 'close'),
array(&$this, 'read'),
array(&$this, 'write'),
array(&$this, 'destroy'),
array(&$this, 'gc')
);
session_start();
}
function unserialize($data_value)
{
$vars = preg_split('/([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\|/', $data_value, -1,
PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE
);
for ($i = 0; isset($vars[$i]); $i++)
{
$result[$vars[$i++]] = unserialize($vars[$i]);
}
return $result;
}
function open($path, $name)
{
return true;
}
function close()
{
return true;
}
function read($session_id)
{
$session_id = $this -> db -> escape_string($session_id);
if ($row = $this -> db -> query("select * from `sessions` where `session_id` = '$session_id' limit 1"))
{
return $row['data_value'];
}
else
{
$this -> db -> query("insert into `sessions` set `session_id` = '$session_id'");
return "";
}
}
function write($session_id, $data_value)
{
$data = $this -> unserialize($data_value);
$session_id = $this -> db -> escape_string($session_id);
$data_value = $this -> db -> escape_string($data_value);
$sql = "update `sessions` set ";
if (isset($data['user_id']))
{
$sql .= "`user_id` = '{$data['user_id']}', ";
}
$sql .= "`data_value` = '$data_value', "
. "`last_visit` = null "
. "where `session_id` = '$session_id'";
$this -> db -> query($sql);
return true;
}
function destroy($session_id)
{
$session_id = $this -> db -> escape_string($session_id);
$this -> db -> query("delete from `sessions` where `session_id` = '$session_id'");
return true;
}
function gc($lifetime)
{
$this -> db -> query("delete from `sessions`
where unix_timestamp(now()) - unix_timestamp(`last_visit`) > $lifetime");
return true;
}
// get sessions by user_id
function get($user_id)
{
$user_id = $this -> db -> escape_string($user_id);
return $this -> db -> query("select * from `sessions` where `user_id` = '$user_id'");
}
// get sessions list
function lists($page, $rows)
{
if ($page == 0)
{
return $this -> db -> query("select * from `sessions` order by `user_id"`);
}
else
{
$start = ($page - 1) * $rows;
return $this -> db -> query("select * from `sessions` order by `user_id` limit $start, $rows");
}
}
}
?>
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