Update moodle user's photo programmatically

update_moodle_photo.php

#!/usr/bin/php
<?php
// USAGE:
// $ php update_moodle_photo.php <user-id-number>
//
// to be able to run this file as command line script
define('CLI_SCRIPT', true);
// include config.php from your moodle's docroot
require_once('/var/www/moodle/config.php');

global $DB;
global $CFG;

// get the idnumber/username from the console
$idnumber = $argv[1];
// get the user by her idnumber, you can use username instead
$user = $DB->get_record('user', array('idnumber'=>$idnumber));

if (!empty($user)) {
        require_once( $CFG->libdir . '/gdlib.php' );
        // path to the image
        $tempfile = '/path/to/photos/' . $idnumber . '.JPG';
        if (file_exists($tempfile)) {
                $usericonid = process_new_icon( context_user::instance( $user->id, MUST_EXIST ), 'user', 'icon', 0, $tempfile );
                if ( $usericonid ) {
                        $DB->set_field( 'user', 'picture', $usericonid, array( 'id' => $user->id ) );
                }
        }
        unset( $tempfile );
} else {
        echo "User not found!";
}

exit;
?>