Newbie format question

[Fionn]

I need help understanding what this code is doing:

$alias = $this->select('url_alias', 'ua')
      ->fields('ua', ['alias'])
      ->condition('ua.source', 'node/' . $nid)
      ->execute()
      ->fetchField();

Thank you for any insight

[Barand]

It's calling those five methods (select, fields, condition, execute, fetchField) in sequence and putting the result into $alias.

[Fionn]

Thank you, Barand. I am just learning and I am not familiar with that notation (using -> to call methods).

[Barand]

This will give you a basic intro to objects and methods