Smarty中{if},{elseif},{else}条件用法介绍

[Herculaneum]

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

{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：

{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

<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：

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


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

)