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Updating WordPress user meta data after login

If you require to update some user meta data after the user logged in to your WordPress site you can use one of the below codes.
This method requires Super Forms v6.3.709 or higher to work
The preferred method would be to use the build in Super Forms hook, using the code below. Simply replace push_id with your form field name and custom_user_meta_data_key with the user meta data key that you would like to update.
add_action('super_before_login_user_action', '_super_update_user_meta_data_after_login', 1);
function _super_update_user_meta_data_after_login($x){
extract(shortcode_atts(array('data'=>array(), 'user_id'=>0), $x));
// We want to update some user meta data from a hidden field named `push_id`
$fieldName = 'push_id';
$metaKey = 'custom_user_meta_data_key';
// In case the field is empty, we don't do anything since the user might have logged in via other means
if(empty($data[$fieldName])) return; 
$data = wp_unslash($data);
$metaValue = trim(sanitize_text_field($data[$fieldName]['value']));
// Now update user meta 
update_user_meta($user_id, $metaKey, $metaValue); 

Method 2

This method also works for any Super Forms version
The second option is to use a WordPress core hook. In this example you will have to do a couple of more steps in order to get the desired result. And you have to take not that this will not be executed if the user tries to login while they where already logged in. That's why it's recommended to use the build in Super Forms hook instead. When using the below code, make sure to replace both the my_form_field_name and my_custom_user_meta_key in the code below accordingly so that they match your form field name and the meta key that requires updating.
add_action('set_current_user', '_super_set_current_user', 10); 
function _super_set_current_user(){ 
$user_id = get_current_user_id(); 
if($user_id==0) return; 
if(empty($_POST['data'])) return; 
$data = array(); 
$data = wp_unslash($_POST['data']); 
$data = json_decode($data, true); 
$data = wp_slash($data); 
if(empty($data['my_form_field_name'])) return; 
$onesignal_push_id = $data['my_form_field_name']['value']; 
// Update user meta 
update_user_meta($user_id, 'my_custom_user_meta_key', $onesignal_push_id);