Obtain the field value of the object in the record queried by the Codeigniter database. how can this problem be solved?

Obtain the field value of the object in the record queried by the Codeigniter database. this is a piece of program models layer functioncheckUser () {& nbsp; $ username = $ this-& gt; input-& gt; post ('Username'); & nbsp get the field value of the object in the record queried by the Codeigniter database
This is a piece of code in codeigniter.
Models layer
Function checkUser ()
{
$ Username = $ this-> input-> post ('Username ');
$ Password = $ this-> input-> post ('password ');
$ This-> db-> from ('user ');
$ This-> db-> where ('username', $ username );
$ This-> db-> where ('password', $ password );
$ Query = $ this-> db-> get ();
Return $ query-> result ();
}
Controller layer:

Public function User_Login ()
{
$ This-> load-> model ('user', '', TRUE );
$ Error ['info'] = "incorrect user name or password! ";
$ Data ['query'] = $ this-> User-> checkUser ();
$ Info = $ this-> User-> checkUser ();
// Print the user information obtained here
Print_r ($ info );
If (! Empty ($ data ['query'])
{
$ This-> load-> view ('user/User_Index ');
}
Else
{
$ This-> load-> view ('index', $ error );
}
}

Here is a bit of a tangle of knowledge points!
The printed information is as follows:
Array ([0] => stdClass Object ([id] => 1 [createdate] => 14:32:18 [flag] => 1 [password] => 123 [username] => user1 [email] => ))


How can I obtain the id of the first object in this array ???


------ Solution --------------------

PHP code

// Modelfunction checkUser () {// omit other code // my personal understanding, only one object will be returned here, it is better to directly return a content $ res_data = $ query-> result_array (); // or $ res_data = $ query-> result (); // if (count ($ res_data) = 1) {$ res_data = reset ($ res_data);} return $ res_data ;} // controllerpublic function User_Login () {$ this-> load-> model ('user', '', TRUE ); $ error ['info'] = "incorrect user name or password! "; $ Data ['query'] = $ this-> User-> checkUser (); $ info = $ this-> User-> checkUser (); // Print the user information print_r ($ info) obtained here; // $ info-> id if (! Empty ($ info ['id']) {$ this-> load-> view ('user/User_Index ');} else {$ this-> load-> view ('index', $ error );}}