engelsystem/includes/sys_log.php

<?php

/**
 * Write a log entry.
 * This should be used to log user's activity.
 *
 * @param
 *          $message
 */
function engelsystem_log($message)
{
    global $user;

    $nick = "Guest";
    if (isset($user)) {
        $nick = User_Nick_render($user);
    }
    LogEntry_create($nick, $message);
}

/**
 * Generates a PHP Stacktrace.
 */
function debug_string_backtrace()
{
    ob_start();
    debug_print_backtrace();
    $trace = ob_get_contents();
    ob_end_clean();

    // Remove first item from backtrace as it's this function which
    // is redundant.
    $trace = preg_replace('/^#0\s+' . __FUNCTION__ . "[^\n]*\n/", '', $trace, 1);

    // Renumber backtrace items.
    // $trace = preg_replace('/^#(\d+)/me', '\'#\' . ($1 - 1)', $trace);

    return $trace;
}