# Howto: Track Member Logins

Sometimes its good to know how active your users are,
and when they last visited the site (and logged on).
A simple `LastVisited` property on the `Member` record
with some hooks into the login process can achieve this.
In addition, a `NumVisit` property will tell us how
often the member has visited. Or more specifically,
how often he has started a browser session, either through
explicitly logging in or by invoking the "remember me" functionality.


```php
use SilverStripe\Forms\ReadonlyField;
use SilverStripe\Security\Security;
use SilverStripe\ORM\DB;
use SilverStripe\ORM\DataExtension;

class MyMemberExtension extends DataExtension 
{
    private static $db = [
        'LastVisited' => 'Datetime',
        'NumVisit' => 'Int',
    ];

    public function memberLoggedIn() 
    {
        $this->logVisit();
    }

    public function memberAutoLoggedIn() 
    {
        $this->logVisit();
    }

    public function updateCMSFields(FieldList $fields) 
    {
        $fields->addFieldsToTab('Root.Main', [
            ReadonlyField::create('LastVisited', 'Last visited'),
            ReadonlyField::create('NumVisit', 'Number of visits')
        ]);
    }

    protected function logVisit() 
    {
        if(!Security::database_is_ready()) return;
        
        DB::query(sprintf(
            'UPDATE "Member" SET "LastVisited" = %s, "NumVisit" = "NumVisit" + 1 WHERE "ID" = %d',
            DB::get_conn()->now(),
            $this->owner->ID
        ));
    }
}

```

Now you just need to apply this extension through your config:

```yml
SilverStripe\Security\Member:
  extensions:
    - MyMemberExtension
```