我无法理解last_record和start_point将如何获得
if(isset($_REQUEST['start_page'])){
$last_record = $_REQUEST['start_page'] * $_REQUEST['limit'];
$start_point = $last_record - $_REQUEST['limit'];
}
else
{
$start_point= 0;
$last_record= 5;
}
if(isset($_REQUEST['limit'])){
$limit = $_REQUEST['limit'];
}
else
{
$limit = 5;
}