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HomeBackend DevelopmentPHP TutorialThinkPHP自定义函数解决模板标签加减运算的方法_PHP

本文实例讲述了ThinkPHP自定义函数解决模板标签加减运算的方法。分享给大家供大家参考。具体如下:

实际项目中,我们经常需要标签变量加减运算的操作。但是,在ThinkPHP中,并不支持模板变量直接运算的操作。

幸运的是,它提供了自定义函数的方法,我们可以利用自定义函数解决:

ThinkPHP模板自定义函数语法如下:

格式:{:function(…)} (参考官方帮助文档:http://thinkphp.cn/Manual/196)
利用这个,我们来试做加法和减法。

一、在ThinkPHP中定义函数。在项目的common文件夹下新建common.php文件(这样系统会自动加载)。定义两个函数:

/** 
 * 相加,供模板使用 
 * @param <type> $a 
 * @param <type> $b 
 */ 
function template_add($a,$b){ 
  echo(intval($a)+intval($b)); 
} 
/** 
 * 相减,供模板使用 
 * @param <type> $a 
 * @param <type> $b 
 */ 
function template_substract($a,$b){ 
  echo(intval($a)-intval($b)); 
} 

二、在模板中使用函数:

代码如下:

{:template_add($var1,$var2)}


即可显出变量var1于var2的和。
需要注意的是:如果变量是数组,要这样显示:

代码如下:

{:template_add($var[var1],$var[var2])}


而不是我们通常是用点语法。

希望本文所述对大家基于ThinkPHP的php程序设计有所帮助。

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