How to define variables and constants in smarty template_PHP tutorial

Defining constants is very simple

The method is:

The code is as follows

{$smarty.const. Constants you define name}

代码如下
{$smarty.const.你定义的常量名}

How to define variables?

Definition of variables in smarty.

　{*The following paragraph is equivalent to defining a variable UserName* inside the template}

The code is as follows

{assign var="UserName" value=" myz"}

代码如下
{assign var="UserName" value="myz"}

A variable defined inside the template will be displayed here: UserName = {$UserName}

Example

The code is as follows

<*assign var="i" value =0*>
<*foreach from=$r_article item=row*>

           <*foreach from=$row item=r*>
                                                                                                       <*$r['title']*>【Read online】 【Download】
                                                                                                                                                                                                            

<*$i = $i + 1*>
<*/foreach*>

代码如下
<*assign var="i" value=0*>  <*foreach from=$r_article item=row*>                        <*foreach from=$row item=r*>                            <*$r['title']*>【在线阅读】 【下载】                         <*/foreach*>                  <*$i = $i + 1*>  <*/foreach*>

Description

1. Define variables in the template, the example is as follows: <{assign var="i" value=0}> (Note: i is an integer, so value=0, no need to add double quotes, otherwise it will be Determined as string type).

Since foreach does not have a counter like for, a counter is customized here to count in the loop; you can also not define a variable on the template page. When including the template page, you can pass a variable i in.

2. Regarding the addition operation in smarty, I tried it and found that smarty does not support the "++" (including ++ before variables and ++ after variables) and "+=", so when adding 1, I still use "++". $i=$i+1" way.

Look at another example

The code is as follows:

The code is as follows

代码如下
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Output effect:

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Note: If the initial value of $i is not 0, such as 1, "math equation=x x=1 assign=i" can also be written as "math equation=1 assign=i", omitting the x variable. It cannot be omitted when it is 0, otherwise a warning message will appear

Warning: Smarty error: math: missing equation parameter

Although it is not a good idea to assign values ​​to variables in the template, you can try the above method if you really need it http://www.bkjia.com/PHPjc/727586.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/727586.html

TechArticleThe very simple way to define constants is: The code is as follows {$smarty.const. The constant name you defined} Define variables How to do it? Define variables in smarty. {*The following paragraph is equivalent to inside the template...