Wordpress - Migrate from User Profile Picture to Simple Local Avatars

migrate-wp-user-avatar.php

<?php
/*
Migrate from User Profile Picture to Simple Local Avatars
Allows sites to easily move away from the WP User Avatar plugin and switch to Simple Local Avatars instead.
Run by invoking with WP CLI like so:
	`wp eval-file migrate-wp-user-avatar.php`
Author: Eliot Hertenstein (forked from Philip John)
Author URI: http://eliothertenstein.com
License: GPLv2
Note: I take no responsibility for data loss throught the use of this script. Use at your own risk
*/

// get the current image ID
$meta_key = 'wp_metronet_image_id';

// Grab all users that have a local avatar.
$users = get_users( [
	'meta_key'     => $meta_key,
	'meta_compare' => 'EXISTS',
] );

foreach ( $users as $user ) {
	// Get the existing avatar media ID.
	$avatar_id = get_user_meta( $user->ID, $meta_key, true );

	// Attach the user and media with Simple Local Avatars.
	$sla = new Simple_Local_Avatars();
	$sla->assign_new_user_avatar( (int) $avatar_id, $user->ID );

	Check that worked.
	$sla_done = get_user_meta( $user->ID, 'simple_local_avatar', true );
	if ( ! empty( $sla_done ) ) {
		// Remove the old WP User Avatar meta data.
		delete_user_meta( $user->ID, $meta_key );
	}
}