Here is my optimized code if needed.
if ( (is_user_logged_in()) && ($_GET['action'] == 'follow') ) {
$user_followed_users = get_field('user_followed_users', 'user_'.$current_user->ID);
$user_followed_users_temp = array();
if (is_array($user_followed_users)) {
foreach($user_followed_users as $user) {
$user_followed_users_temp[] = $user['ID'];
}
if (!in_array($curauth->ID, $user_followed_users_temp)) {
$user_followed_users_temp[] = $curauth->ID;
} else {
// Clicking twice will remove the user form user followed list
if(($key = array_search($curauth->ID, $user_followed_users_temp)) !== false) {
unset($user_followed_users_temp[$key]);
}
}
} else {
$user_followed_users_temp = array($curauth->ID);
}
update_field('user_followed_users', $user_followed_users_temp, 'user_'.$current_user->ID);
}
