网络营销电子商务研究中心 - Smarty中{if},{elseif},{else}条件用法介绍

Smarty中{if},{elseif},{else}条件用法，有需要学习的朋友可参考一下。

php Smarty模板条件选择结构if-elseif-else，{if}必须和{/if}成对出现，当然也可以使用{else}和{elseif}子句，{if}中可以使用如下修饰词：

if实例

Example 7.15. {if} statements

Code:

{if $name eq 'Fred'}

     Welcome Sir.

 {elseif $name eq 'Wilma'}

     Welcome Ma'am.

 {else}

     Welcome, whatever you are.

 {/if}



{* an example with "or" logic *}

 {if $name eq 'Fred' or $name eq 'Wilma'}

    ...

 {/if}



{* same as above *}

 {if $name == 'Fred' || $name == 'Wilma'}

    ...

 {/if}





 {* parenthesis are allowed *}

 {if ( $amount < 0 or $amount > 1000 ) and $volume >= #minVolAmt#}

    ...

 {/if}





 {* you can also embed php function calls *}

 {if count($var) gt 0}

    ...

 {/if}



{* check for array. *}

 {if is_array($foo) }

    .....

 {/if}



{* check for not null. *}

 {if isset($foo) }

    .....

 {/if}





 {* test if values are even or odd *}

 {if $var is even}

    ...

 {/if}

 {if $var is odd}

    ...

 {/if}

 {if $var is not odd}

    ...

 {/if}





 {* test if var is divisible by 4 *}

 {if $var is div by 4}

    ...

 {/if}





 {*

   test if var is even, grouped by two. i.e.,

   0=even, 1=even, 2=odd, 3=odd, 4=even, 5=even, etc.

 *}

 {if $var is even by 2}

    ...

 {/if}



{* 0=even, 1=even, 2=even, 3=odd, 4=odd, 5=odd, etc. *}

 {if $var is even by 3}

    ...

 {/if}

if elseif 实例：

Code:

{if isset($name) && $name == 'Blog'}

      {* do something *}

 {elseif $name == $foo}

     {* do something *}

 {/if}



{if is_array($foo) && count($foo) > 0}

     {* do a foreach loop *}

 {/if}

实例

Code:

<table>

             {foreach from=$users item=row}

                 <tr>

                     {foreach from=$row item=col key=k}

                         {* 注意if语句与小括号(不是必须的)之间的空格，有严格的要求 *}

                         <td {if ($col == 'wjj') }style='color:red;'{elseif ($col == 'qxy')}style='color:green;'{/if}>{$k}:{$col}</td>

                     {/foreach}

                 </tr>

                 {foreachelse}

                     <tr><td>没有数据啊</td></tr>

             {/foreach}

         </table>

程序为$users变量赋值为如下数组：

Code:

array(

     array('name' => 'wjj','age' => '保密'),





     array('name' => 'qxy','age' => '好像比我小')



)