{foreach},{foreachelse}
用於像訪問序數數組一樣訪問關聯數組
{foreach},{foreachelse}
{foreach} is used to loop over an associative array as well a numerically-indexed array, unlike {section} which is for looping over numerically-indexed arrays only. The syntax for {foreach} is much easier than {section}, but as a tradeoff it can only be used for a single array. Every {foreach} tag must be paired with a closing {/foreach} tag.
{foreach} 用於像循環訪問一個數字索引數組一樣循環訪問一個關聯數組,與僅能訪問數字索引數組的{section}不同,{foreach}的語法比 {section}的語法簡單得多,但是作為一個折衷方案也僅能用於單個數組。每個{foreach}標記必須與關閉標記{/foreach}成對出現。
Attribute Name 屬性名稱 |
Type 類型 |
Required 必要 |
Default 默認值 |
Description 描述 |
---|---|---|---|---|
from | array | Yes必要 | n/a | The array you are looping through 循環訪問的數組 |
item | string | Yes必要 | n/a | The name of the variable that is the current element 當前元素的變量名 |
key | string | No可選 | n/a | The name of the variable that is the current key 當前鍵名的變量名 |
name | string | No可選 | n/a | The name of the foreach loop for accessing foreach properties 用於訪問foreach屬性的foreach循環的名稱 |
-
Required attributes are from and item.
- from和item是必要屬性
-
The name of the {foreach} loop can be anything you like, made up of letters, numbers and underscores, like PHP variables.
- {foreach}循環的name可以是任何字母,數組,下划線的組合,參考PHP變量。
-
{foreach} loops can be nested, and the nested {foreach} names must be unique from each other.
- {foreach}循環可以嵌套,嵌套的{foreach}的名稱應當互不相同。
-
The from attribute, usually an array of values, determines the number of times {foreach} will loop.
- from屬性通常是值數組,被用於判斷{foreach}的循環次數。
-
{foreachelse} is executed when there are no values in the from variable.
- 在from變量中沒有值時,將執行{foreachelse}。
-
{foreach} loops also have their own variables that handle properties. These are accessed with: {$smarty.foreach.name.property} with "name" being the nameattribute.
-
{foreach}循環也有自身屬性的變量,可以通過{$smarty.foreach.name.property}訪問,其中"name"是name屬性。
Note: The name attribute is only required when you want to access a {foreach} property, unlike {section}. Accessing a {foreach} property with nameundefined does not throw an error, but leads to unpredictable results instead.
-
注意:name屬性僅在需要訪問{foreach}屬性時有效,與{section}不同。訪問未定義name的{foreach}屬性不會拋出一個錯誤,但將導致不可預知的結果。
-
{foreach} properties are index, iteration, first, last, show, total.
- {foreach}屬性有index, iteration, first, last, show, total.
- Example 7-7. {foreach} with associative item attribute
- 例 7-7. {foreach}的item屬性是關聯數組
- <?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 $myId in the url
- 模板中,url通過$myId輸出$items
- <ul>
- {foreach from=$items key=myId item=i}
- <li><a href="http://blog.163.com/lgh_2002/blog/item.php?id={$myId}">{$i.no}: {$i.label}</li>
- {/foreach}
- </ul>
- The above example will output:
- 上例將輸出:
- <ul>
- <li><a href="http://blog.163.com/lgh_2002/blog/item.php?id=23">2456: Salad</li>
- <li><a href="http://blog.163.com/lgh_2002/blog/item.php?id=96">4889: Cream</li>
- </ul>
- Example 7-8. {foreach} with nested item and key
- 例 7-8. {foreach}使用嵌套的item和key
- Assign an array to Smarty, the key contains the key for each looped value.
- 向Smarty設置一個數組,對於每個鍵名對應的每個循環值都包括鍵。
- <?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 $contact.
- 用於輸出$contact的模板。
- <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:
- 上例將輸出:
- <hr />
- phone: 1<br />
- fax: 2<br />
- cell: 3<br />
- <hr />
- phone: 555-4444<br />
- fax: 555-3333<br />
- cell: 760-1234<br />
.index
index contains the current array index, starting with zero.
.index包含當前數組索引,從零開始。
- {* 每五行輸出一次頭部區塊 *}
- <table>
- {foreach from=$items key=myId item=i name=foo}
- {if $smarty.foreach.foo.index % 5 == 0}
- <tr><th>Title</th></tr>
- {/if}
- <tr><td>{$i.label}</td></tr>
- {/foreach}
- </table>
.iteration
iteration contains the current loop iteration and always starts at one, unlike index. It is incremented by one on each iteration.
iteration包含當前循環次數,與index不同,從1開始,每次循環增長1。
- {* 該例將輸出0|1, 1|2, 2|3, ... 等等 *}
- {foreach from=$myArray item=i name=foo}
- {$smarty.foreach.foo.index}|{$smarty.foreach.foo.iteration},
- {/foreach}
.first
first is TRUE if the current {foreach} iteration is the initial one.
first在當前{foreach}循環處於初始位置時值為TRUE。
- {* 對於第一個條目顯示LATEST而不是id *}
- <table>
- {foreach from=$items key=myId item=i name=foo}
- <tr>
- <td>{if $smarty.foreach.foo.first}LATEST{else}{$myId}{/if}</td>
- <td>{$i.label}</td>
- </tr>
- {/foreach}
- </table>
.last
last is set to TRUE if the current {foreach} iteration is the final one.
last在當前{foreach}循環處於最終位置是值為TRUE。
- {* 在列表結束時增加一個水平標記 *})
- {foreach from=$items key=part_id item=prod name=products}
- <a href="http://blog.163.com/lgh_2002/blog/#{$part_id}">{$prod}</a>{if $smarty.foreach.products.last}<hr>{else},{/if}
- {foreachelse}
- ... content ...
- {/foreach}
.show
show is used as a parameter to {foreach}. show is a boolean value. If FALSE, the {foreach} will not be displayed. If there is a {foreachelse} present, that will be alternately displayed.
show是{foreach}的參數. show是一個布爾值。如果值為FALSE,{foreach}將不被顯示。如果有對應的{foreachelse},將被顯示。
.total
total contains the number of iterations that this {foreach} will loop. This can be used inside or after the {foreach}.
total包括{foreach}將循環的次數,既可以在{foreach}中使用,也可以在之后使用。
- {* 在結束位置顯示行數 *}
- {foreach from=$items key=part_id item=prod name=foo}
- {$prod.name><hr/>
- {if $smarty.foreach.foo.last}
- <div id="total">{$smarty.foreach.foo.total} items</div>
- {/if}
- {foreachelse}
- ... something else ...
- {/foreach}
See also {section} and $smarty.foreach.