CodeIgniter 3.x Logging Back Trace Helper

ci3_exlog_helper.php

<?php
if (! function_exist('logDebug')) {

    function logDebug($message)
    {
        $trace = debug_backtrace();
        $output = 'UserLog: ' . $trace[1]["class"] . '::' . $trace[1]['function'] . ' - ';
        if (is_array($message)) {
            $message = print_r($message, true);
        }
        $output .= $message;
        log_message('debug', $output);
    }
}

if (! function_exists('logError')) {

    function logError($message)
    {
        $trace = debug_backtrace();
        $output = 'UserLog: ' . $trace[1]["class"] . '::' . $trace[1]['function'] . ' - ';
        if (is_array($message)) {
            $message = print_r($message, true);
        }
        $output .= $message;
        log_message('error', $output);
    }
}