dump调试函数

//dump调试函数
if (!function_exists('dump')) {
    /*
     * dump调试函数
     */
    function dump($var)
    {
        $traces = debug_backtrace();
        foreach ($traces as $trace) {
            if (isset($trace['function']) && in_array($trace['function'], array('dump'))) {
                echo '<small>' . $trace['file'] . ':' . $trace['line'] . '</small>' . "\n";
                break;
            }
        }
        array_map(function ($var) {
            ob_start();
            var_dump($var);
            $output = ob_get_clean();
            if (!extension_loaded('xdebug')) {
                $output = preg_replace('/\]\=\>\n(\s+)/m', '] => ', $output);
                echo '<pre>' . htmlspecialchars($output, ENT_QUOTES) . '</pre>';
            } else {
                $traces = debug_backtrace();
                foreach ($traces as $trace) {
                    if (isset($trace['function']) && in_array($trace['function'], array('dump'))) {
                        echo preg_replace('/<small>[^>]*:\d+:<\/small>\r?\n?/i', '<small style="color:#999;">→</small> ', $output);
                        break;
                    }
                }
            }
        }, func_get_args());
    }
}

调用：
dump(11,22,[3,4],["a"=>5,"b"=>6], new \stdClass());

输出：