html5 css3实现下拉刷新、上拉分页，使用jquery ajax从服务器获取数据

<?php define("DEFAULT_PAGE", 1); define("DEFAULT_PAGESIZE", 25); define("TOTAL", 55); $page = DEFAULT_PAGE; $pagesize = DEFAULT_PAGESIZE; if (empty($_REQUEST['page']) || !isset($_REQUEST['page']) || $_REQUEST['page']=='' || $_REQUEST['page']==null) { $page = DEFAULT_PAGE; } else { $page = $_REQUEST['page']; } if (empty($_REQUEST['pagesize']) || !isset($_REQUEST['pagesize']) || $_REQUEST['pagesize']=='' || $_REQUEST['pagesize']==null) { $pagesize = DEFAULT_PAGESIZE; } else { $pagesize = $_REQUEST['pagesize']; } $result = '{"list":['; $offset = ($page - 1) * $pagesize; $pagetotal = $page * $pagesize; date_default_timezone_set('Etc/GMT-8'); $time = date("Y-m-d H:i:s"); for ($i = 1 + $offset; $i <= $pagetotal && $i <= TOTAL; $i++) { if ($i != 1 + $offset) { $result .= ','; } $result .= '{"id":'.$i; $result .= ',"name":"item'.$i.'"'; $result .= ',"time":"'.$time.'"'; $result .= '}'; } $result .= ']}'; sleep(1); echo $result; ?>