How to call functions in thinkphp

thinkphp template calls the function method:

{变量|函数1|函数2|函数3=参数1,参数2,参数3,###}

is the 4th parameter, which represents the replacement of the variable with the 4th parameter

Example:

{$username|substr=0,3}取标题中前3个字符
{$times|date='Y-m-d H:i:s'，###}将times时间戳转换为日期格式

Usage of colon execution function: output method and execute return value

{:U('user/insert')}

Example:

{:time()} 会输出当前日期格式 ，会被解析成 <?php echo time(); ?>

Usage of wavy line function: execution method but Do not output

{~function()}

Example:

{~substr("aaaaaaa",3)} 执行后不会输出，会背解析成 <?php substr ?>

{$Think.get.url中get过来的参数}
{$Think.server.server中的变量}
{$Think.session.session中的id|md5} 如果需要的话还可以对值MD5一下
{$Think.cookie.cookie中的id}

{$Think.config.db_host} 读取config中的配置信息
{($title)?($title):'当前没有值'} 当前参数若没有值，则显示后面的描述

<switch name="">
<case value="1">aaaaaa</case>
<case value="2">bbbbbbbbb</case>
<default />没有数据
</switch>

<eq name="a" value="3">a等于3<else />a不等于3</eq>
<eq name="a|strlen" value="1">a的长度等于1<else />a长度不等于1</eq>

<in name="a" value="1,2,3,4">变量a值在1,2,3,4范围内就打印</in>
<notin name="a" value="1,2,3,4">变量a值不在1,2,3,4范围内就打印</notin>

or use ###

<range name="a" value="1,2,3,4" type="in">a在1,2,3,4范围内</range> //type改为notin就是不在，该方法可替代in和notin

<empty name="a">a变量为空</empty>
<notempty name="a">a变量不为空</notempty>

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