Description
Creates a username from the email address provided.
If WooCommerce is installed, it will use wc_create_new_customer_username() to generate a username. Otherwise, it will begin with the first part of the user’s email address. That is checked for uniqueness in the wp_users table. If it is not unique, it will add an integer to the end until it finds a unique value.
Parameters
$email
(string) (required) The email address to convert.
Changelog
Introduced in version 3.4.6
Source
wpmem_create_username_from_email() is located in /inc/api-users.php.