Call custom function before login in wordpress

问题:

I want to call a custom function before login using the entered login & password and if that function returns true than user should proceed to login.

I have tried add_action('wp_login', 'do_anything'); to do this but it called my custom function after login.

Is there any way to do call custom function before login?

回答1:

You're looking for the wp_authenticate action hook.

This action is located inside of wp_signon. In contrast to the wp_login action, it is executed before the WordPress authentication process.

EDIT: You didn't include much info in your post, but the wp_authenticate_user filter may also be useful.

The wp_authenticate_user filter hook is used to perform additional validation/authentication any time a user logs in to WordPress.