摘要：
It is recommended to use either the mysqli or PDO_MySQL extensions. It is not recommended to use the old mysql extension for new development, as it has been deprecated as of PHP 5.5.0 and will be removed in the future.官方建议使用mysqli的库，因为mysql库会在PHP5.5.0里去掉，所以建议在新项目中使用mysqli_real_escape_string一，首先看adds 阅读全文