Question

I’m using twitter login for my site,when user entered with his twitter login id then how can I check this user is already registered in my database or new user.

and 1 more thing-
when I print print_r($user_info); then I received

stdClass Object
 (
[id_str] => 395809931
[default_profile] => 1
[time_zone] => 
[created_at] => Sat Oct 22 08:45:33 +0000 2011
[profile_text_color] => 333333
[protected] => 
[default_profile_image] => 1
[profile_background_image_url] => http://a0.twimg.com/images/themes/theme1/bg.png
[name] => om nath

and more……..
)
how can I read and use this [id_str] .

Answer 1

Well, for starters, you can pull out the id_str by accessing the id_str property of the $user_info object.

$id = $user_info->id_str;

After that, figuring out if they are already registered is dependent on how you are storing your users. Is twitter oauth the only mechanism for logging in? If so, then you can use the id_str as your primary key for your user table. Then you would just do a query against the DB to see if they exist. Assuming mysql, your query would be something like

SELECT user_id FROM users WHERE user_id = '$id';