<?php session_start(); $k=$_GET['k']; $t=$_GET['t']; $allowTime = 5 ;//防刷新时间 $ip = $_SERVER["REMOTE_ADDR"]; $allowT = md5($ip.$k.$t); if(!isset($_SESSION[$allowT])) { $refresh = true; $_SESSION[$allowT] = time(); }elseif(time() - $_SESSION[$allowT]>$allowTime){ $refresh = true; $_SESSION[$allowT] = time(); }else{ echo '<script>alert("您好,请5秒钟后再次刷新,感谢您的理解与支持")</script>'; $refresh = false; } ?>