html_options函数

该函数可以指定哪些元素被选定. 要么必须指定 values 和 ouput 属性，要么指定 options 替代.

如果给定值是数组，将作为 OPTGROUP 处理，且支持递归. 所有的输出与 XHTML 兼容. 

如果指定了可选属性 name，该选项列表将将被置于<select name="groupname"></select>标签对中. 如果没有指定，那么只产生选项列表.

上表未提到的其它参数在 <select> 标签中以"名称/属性"对的方式显示. 如果没有指定可选属性 name 这些参数将被忽略.

eg1:

test.php:

require('Smarty.class.php');
$smarty = new Smarty;
$smarty->assign('cust_ids', array(1000,1001,1002,1003));
$smarty->assign('cust_names', array('Joe Schmoe','Jack Smith','Jane
Johnson','Carlie Brown'));
$smarty->assign('customer_id', 1001);
$smarty->display('test.html');

test.html:

<select name=customer_id>
{html_options values=$cust_ids selected=$customer_id output=$cust_names}
</select>

eg2:

test.php:
require('Smarty.class.php');
$smarty = new Smarty;
$smarty->assign('cust_options', array(
1001 => 'Joe Schmoe',
1002 => 'Jack Smith',
1003 => 'Jane Johnson',
1004 => 'Charlie Brown'));
$smarty->assign('customer_id', 1001);
$smarty->display('test.html');

test.html:
<select name=customer_id>
{html_options options=$cust_options selected=$customer_id}
</select>


输出: 
<select name=customer_id>
<option value="1000">Joe Schmoe</option>
<option value="1001" selected="selected">Jack Smith</option>
<option value="1002">Jane Johnson</option>
<option value="1003">Charlie Brown</option>
</select>