2.核心代码
显示的逻辑：
//获取防止刷新的唯一标识符,start
$intFlag = substr(md5(time()),6);
$strFlag = 'BAOXIAOSS_'.$my_user_id.$intFlag;
$smarty->assign('check_is_agin_post', $strFlag);
//获取防止刷新的唯一标识符,end注意：前端页面提交加入这个变量。下面是提交的逻辑//校验是否重复提交，start
if(!empty($post_data['check_is_agin_post']))
{$check_is_agin_post = $_COOKIE[$post_data['check_is_agin_post']];if(!empty($check_is_agin_post)){die('提交重复');}setcookie($post_data['check_is_agin_post'], 1, time()+10);
}
//校验是否重复提交，end$request_url = db_url::getRequestUrlData();
$links = array(array('href' =>$request_url['HTTP_REFERER'], 'text' => '返回')
);
3.类的方法
<?phpclass db_url
{static public $status_arr = array();//获取请求的urlstatic function getRequestUrl(){//获取当前完整url,为了清晰，多定义几个变量,分几行写$scheme = $_SERVER['REQUEST_SCHEME']; //协议$domain = $_SERVER['HTTP_HOST']; //域名/主机$requestUri = $_SERVER['REQUEST_URI']; //请求参数//将得到的各项拼接起来$currentUrl = $scheme . "://" . $domain . $requestUri;return $currentUrl; //传回当前url}//返回请求URl的多个数据static function getRequestUrlData(){//获取当前完整url,为了清晰，多定义几个变量,分几行写$scheme = $_SERVER['REQUEST_SCHEME']; //协议$domain = $_SERVER['HTTP_HOST']; //域名/主机$requestUri = $_SERVER['REQUEST_URI']; //请求参数//将得到的各项拼接起来$currentUrl = $scheme . "://" . $domain . $requestUri;$return_data = ['REQUEST_SCHEME'=>$_SERVER['REQUEST_SCHEME'],'HTTP_HOST'=>$_SERVER['HTTP_HOST'],'HTTP_REFERER'=>$_SERVER['HTTP_REFERER'],'REQUEST_URI'=>$_SERVER['REQUEST_URI'],'url'=>$currentUrl,];return $return_data; //传回当前url}//获取url的参数返回数组static function getParams($url){$arr = parse_url($url);$arr_query = self::convertUrlQuery($arr['query']);return $arr_query?$arr_query:[];}static function convertUrlQuery($query){$queryParts = explode('&', $query);$params = array();foreach ($queryParts as $param) {$item = explode('=', $param);$params[$item[0]] = $item[1];}return $params;}/*** 将参数变为字符串* @param $array_query* @return string string 'm=content&c=index&a=lists&catid=6&area=0&author=0&h=0®ion=0&s=1&page=1' (length=73)*/static function getUrlQuery($array_query){$tmp = array();foreach($array_query as $k=>$param){$tmp[] = $k.'='.$param;}$params = implode('&',$tmp);return $params;}
}?>