How to define variables and constants in smarty template_PHP tutorial

Defining constants is very simple

The method is:

How to define variables?

Definition of variables in smarty.

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

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

Example

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:

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