PHP SHOW Firewall Version：1.1.2 minor bug fixes and improvements. How to use： 1. if ( is_file( "./firewall.php" ) ){require_once ("./firewall.php");} 2. change $_POST["str"]; to check($_POST["str"]); change $_GET["str"]; to check($_GET["str"]); Coding：utf-8 Version: 1 new SQL injection protection Version: 1.0.1 disable caching Version: 1.0.2 not display PHP error Version: 1.0.3 XSS attack protection Version: 1.1 defensive upgrade Version: 1.1.1 Unified case problems Version: 1.1.2 minor bug fixes and improvements