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
{if} 实例：
{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} .<span>%本文来源gaodai#ma#com搞*代#码9网#</span><strong>搞gaodaima代码</strong>..{/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'))
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