Smarty中{if},{elseif},{else}条件用法介绍

作者：袖梨 2022-06-25

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

 

 代码如下 复制代码

{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：

 代码如下 复制代码

{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

      

 代码如下 复制代码

            {foreach from=$users item=row}
               
                    {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 *}
                       
                    {/foreach}
               
                {foreachelse}
                   
            {/foreach}
       
{$k}:{$col}
没有数据啊

程序为$users变量赋值为如下数组：

 代码如下 复制代码

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


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

)

参考

Qualifier Alternates Syntax Example Meaning PHP Equivalent
== eq $a eq $b equals ==
!= ne, neq $a neq $b not equals !=
> gt $a gt $b greater than >
< lt $a lt $b less than <
>= gte, ge $a ge $b greater than or equal >=
<= lte, le $a le $b less than or equal <=
===   $a === 0 check for identity ===
! not not $a negation (unary) !
% mod $a mod $b modulous %
is [not] div by   $a is not div by 4 divisible by $a % $b == 0
is [not] even   $a is not even [not] an even number (unary) $a % 2 == 0
is [not] even by   $a is not even by $b grouping level [not] even ($a / $b) % 2 == 0
is [not] odd   $a is not odd [not] an odd number (unary) $a % 2 != 0
is [not] odd by   $a is not odd by $b [not] an odd grouping ($a / $b) % 2 != 0

相关文章

精彩推荐