我得到这些错误行：
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 120
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 122
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 124
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 126
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 128
[29-Jan-2016 00:27:59 Africa/Cairo] PHP Strict Standards: Non-static method sessions::set_sessions() should not be called statically in /home/trizipo/public_html/admin/controller/login.php on line 130
关于此代码：代码图片有解决办法吗？
sessions类中set_sessions的方法不包含 static 关键字。如果您打算静态调用它，它应该如下所示：
class sessions
{
....
public static function set_sessions($key, $value)
{
...
}
...
}