foreach的用法

案例1：The item attribute

<?php
$arr = array(1000, 1001, 1002);
$smarty->assign('myArray', $arr);
?>

Template to output $myArray in an un-ordered list

<ul>
{foreach from=$myArray item=foo}
    <li>{$foo}</li>
{/foreach}
</ul>

The above example will output:

<ul>
    <li>1000</li>
    <li>1001</li>
    <li>1002</li>
</ul>

案例2：Demonstrates the item and key attributes

<?php
$arr = array(9 => 'Tennis', 3 => 'Swimming', 8 => 'Coding');
$smarty->assign('myArray', $arr);
?>

Template to output $myArray as key/val pair, like PHP's foreach.

<ul>
{foreach from=$myArray key=k item=v}
   <li>{$k}: {$v}</li>
{/foreach}
</ul>

The above example will output:

<ul> <li>9: Tennis</li> <li>3: Swimming</li> <li>8: Coding</li> </ul>

 

案例3：{foreach} with associative item attribute

<?php
$items_list = array(23 => array('no' => 2456, 'label' => 'Salad'),
                    96 => array('no' => 4889, 'label' => 'Cream')
                    );
$smarty->assign('items', $items_list);
?>

Template to output $items with $myId in the url

<ul>
{foreach from=$items key=myId item=i}
  <li><a href="item.php?id={$myId}">{$i.no}: {$i.label}</li>
{/foreach}
</ul>

The above example will output:

<ul>
  <li><a href="item.php?id=23">2456: Salad</li>
  <li><a href="item.php?id=96">4889: Cream</li>
</ul>

案例4： {foreach} with nested item and key

<?php
 $smarty->assign('contacts', array(
                             array('phone' => '1',
                                   'fax' => '2',
                                   'cell' => '3'),
                             array('phone' => '555-4444',
                                   'fax' => '555-3333',
                                   'cell' => '760-1234')
                             ));
?>

The template to output $contact.

{foreach name=outer item=contact from=$contacts}
  <hr />
  {foreach key=key item=item from=$contact}
    {$key}: {$item}<br />
  {/foreach}
{/foreach}

The above example will output:

<hr />
  phone: 1<br />
  fax: 2<br />
  cell: 3<br />
<hr />
  phone: 555-4444<br />
  fax: 555-3333<br />
  cell: 760-1234<br />

小结：

记住常用方法，并能灵活运动，举一反三。

没必要所有的都会使用，会使用常用的就可以了。