[PHP知识库]PHP打印格式输出的函数

    /**
     * 输出变量的内容，通常用于调试
     *
     * @package Core
     *
     * @param mixed $vars 要输出的变量
     * @param string $label
     * @param boolean $return
     */
    public function dump($vars, $label = '', $return = false)
    {
        if (ini_get('html_errors')) {
            $content = "<pre>\n";
            if ($label != '') {
                $content .= "<strong>{$label} :</strong>\n";
            }
            $content .= htmlspecialchars(print_r($vars, true));
            $content .= "\n</pre>\n";
        } else {
            $content = $label . " :\n" . print_r($vars, true);
        }
        if ($return) { return $content; }
        echo $content;
        return null;
    }