smarty section start step max使用

......
<table border="1">
    <{section name=i loop=$arrs}>
      <tr>
        <{section name=j loop=$arrs[i]}>        
          <td><{$arrs[i][j]}></td>
        <{/section}>
      </tr>
    <{/section}>
</table>
<{section name=i loop=$arr start=5 step=2 max=6}>
<{$arr[i]}>,
<{/section}>

<?php 
header("Content-type: text/html; charset=utf-8");
//设置中国时区
date_default_timezone_set('PRC');

require_once("./Smarty/libs/Smarty.class.php");
$smarty = new Smarty();
$smarty->left_delimiter="<{";
$smarty->right_delimiter="}>";

$arrs=array(
    array(1,'孙悟空','花果山'),
    array(2,'猪八戒','高老庄'),
    array(3,'沙和尚','流沙河'),
    array(4,'唐三藏','东土大唐')
   );
$smarty->assign("arrs",$arrs);

$arr=array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20);
$smarty->assign("arr",$arr);
// var_dump($arrs);
$smarty->display("./view.html");