$limit变量设为一分钟可提交几次
例子可作为浏览人气，抽奖参考
<?php header('Content-Type:text/html;charset=UTF-8'); session_start(); $limit = 5; //限制的次数 $ip = getip(); $time = date('Y-m-d H:i'); if (isset($_SESSION[$time])) { $ipnum = renum($_SESSION[$time], $ip); } else { $ipnum = 0; } if ($ipnum >= $limit * 2) { exit("一分钟内只允许提交{$limit}次"); } if (isset($_REQUEST['url'])) { $url = $_REQUEST['url']; } else { $url = 0; } $_SESSION[$time][] = $ip; exit("提交成功"); function getip() { if (!empty($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip = $_SERVER['HTTP_X_FORWARDED_FOR']; } else { $ip = $_SERVER['REMOTE_ADDR']; } return $ip; } function renum($array, $get) { $n = 0; foreach ($array as $val) { if ($val == $get) { $n++; } } return $n; }
