$num_show=7;
$page = $_GET['page']?$_GET['page']:1;
$str_sql="SELECT * FROM pro_tijiao order by id DESC limit ".$num_show*$page.", $num_show ";
$page = $_GET['page']?$_GET['page']:1;
$str_sql="SELECT * FROM pro_tijiao order by id DESC limit ".$num_show*$page.", $num_show ";
在 ######## 的地方又应该怎么写才对呢?