How to get user ID during registration and add it to a custom table

Question

I am trying to get the user ID during registration and automatically add that ID to my custom table. I am using the WP-Members plugin for registration.

Is it possible to get user ID on the fly while registering and add that ID to another custom table with WP-Members plugin.

Or I could use a custom registration page if required; but I need some guidance how to get user ID on the fly during registration.

Anyone please help me...

Answer 1

Please take a look at user_register hook

This is fired when a new user is registered and conveniently passes you the user ID of the new user.

function function_name( $user_id )
{        
    /* do what you want to do with ID here */
}
add_action( 'user_register', 'function_name');

Answer 2

@Brady's answer is correct because WP-Members does use WP's function for inserting a new user, so that action does get called. And if you want flexibility and you are only using the new user's ID for all of it, that's a good approach.

But a secondary approach would be to use WP-Members' wpmem_post_register_data action. That action passes all of the user's registration data an array keyed by the field meta keys and it includes ID.

add_action( 'wpmem_post_register_data', 'my_reg_hook' );
function my_reg_hook( $fields ) {
    /* 
     * ID is available as $fields['ID']
     * Other fields are $fields['the_fields_meta_key']
     *
     * do your stuff here
     */
    return;
}

The documentation for the action has a list of fields that will be included in the array in addition to any custom fields that are in there by meta key:

https://rocketgeek.com/plugins/wp-members/docs/filter-hooks/wpmem_post_register_data/