Change record status: 
Project: 
Introduced in branch: 
8.x
Description: 

Only the names have changed; both the function and the hook are functionally identical to their Drupal 7 versions.

Example:

<?php
// Drupal 7
$username = format_username($user);
/**
* Implements hook_username_alter().
*/
function MYMODULE_username_alter(&$name, $account) {
 
// Do whatever.
}
// Drupal 8
$username = user_format_name($user);
/**
* Implements hook_user_format_name_alter().
*/
function MYMODULE_user_format_name_alter(&$name, $account) {
 
// Do exactly the same thing here.
}
?>
Impacts: 
Module developers
Themers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done