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I am writing a plugin that fetches some extended user info from a remote service and I need it to execute its function each time a user logs in.

Is there a hook that gets fired after login that I can add an action to?

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2 Answers 2

up vote 10 down vote accepted

The action hook wp_login runs when the user logs in - it can run a simple function.

function do_anything() {
    //do stuff
}
add_action('wp_login', 'do_anything');

The real breadwinner here is wp_authenticate which has a bit of documentation. It passes an array with the given username and password, which gives you the opportunity to pass info to the remote service, if necessary.

http://codex.wordpress.org/Plugin_API/Action_Reference/wp_authenticate

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no this runs when user clicks on login but before user gets verified. is there any hook that runs after user login and authentication success?????? –  user13690 Feb 29 '12 at 21:06
    
whoopsie... I'll check and update the answer. –  Drew Gourley Feb 29 '12 at 23:00
    
Checked, wp_login does run after authentication. What specifically do you need done? –  Drew Gourley Feb 29 '12 at 23:07
    
wp_authenticate was what I was looking for. Thanks! –  Adam Franco May 24 '12 at 19:35

I would caution against using wp_login. It is deprecated and in later versions of WordPress it may not work at all. Instead try the wp_signon function.

Edit: The wp_login function is depreciated but the wp_login action is fine to use.

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protected by toscho Aug 1 '12 at 21:01

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