ThinkPHP模板判断输出Empty标签用法详解
ThinkPHP模板的empty标签用于判断模板变量是否为空值。
ThinkPHP模板empty标签用来判断模板变量是否为空值,其功能相当于PHP中的empty()函数行为。empty标签使用格式如下:
<empty name="变量名">要输出的内容</empty>
具体用法如下例所示:
<empty name="username">username 为空值</empty
该例子等同于:
<?php if(empty($username)){ echo 'username 为空值'; } ?>
如果判断非空值可使用notempty标签,如下所示:
<notempty name="username">username 不为空</notempty>
两个标签合并起来可写成:
<empty name="username">username 为空值<else/>username 不为空</empty>

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