Location: PHPKode > projects > Moodle > moodle/tag/user.php
<?php

require_once('../config.php');
require_once('lib.php');

$action = optional_param('action', '', PARAM_ALPHA);
$id = optional_param('id', 0, PARAM_INT);
$tag = optional_param('tag', '', PARAM_TAG);

require_login();

if (empty($CFG->usetags)) {
    print_error('tagdisabled');
}

if (isguestuser()) {
    print_error('noguest');
}

if (!confirm_sesskey()) {
    print_error('sesskey');
}


switch ($action) {
    case 'addinterest':
        if (empty($tag) && $id) { // for backward-compatibility (people saving bookmarks, mostly..)
            $tag = tag_get_name($id);
        }

        tag_set_add('user', $USER->id, $tag);

        redirect($CFG->wwwroot.'/tag/index.php?tag='. rawurlencode($tag));
        break;

    case 'removeinterest':
        if (empty($tag) && $id) { // for backward-compatibility (people saving bookmarks, mostly..)
            $tag = tag_get_name($id);
        }

        tag_set_delete('user', $USER->id, $tag);

        redirect($CFG->wwwroot.'/tag/index.php?tag='. rawurlencode($tag));
        break;

    case 'flaginappropriate':

        $tagid = tag_get_id($tag);
        // Add flaging action to logs
        add_to_log(SITEID, 'tag', 'flag', 'index.php?id='. $tagid, $tagid, '', $USER->id);

        tag_set_flag($tagid);

        redirect($CFG->wwwroot.'/tag/index.php?tag='. rawurlencode($tag), get_string('responsiblewillbenotified', 'tag'));
        break;

    default:
        print_error('unknowaction');
        break;
}
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