Section loop in php

In php, the smarty section loop problem {yun:} section name = "menu" loop = $ navigation {/yun}
{Yun:} assign var = "one_menu_id" value = $ navigation [menu]. id {/yun}

{Yun:} section name = "menud" loop = $ one_menu [$ one_menu_id] {/yun}
{Yun:} assign var = "two_menu_rows" value = $ one_menu [$ one_menu_id] {/yun}
{Yun:} assign var = "two_menu_id" value = $ one_menu [$ one_menu_id] [menud]. id {/yun}



What do red labels mean? Is there such a way in smarty ??

Reply to discussion (solution)

Find some of the Smarty manual
1. assign

Define a template variable and assign values

Format: <{assign var = "variable name" value = "value"}>

What makes you think he is smarty?

So how do you understand the structure of this code?

{Assign} is used to assign values to variables during Template running.
Http://www.smarty.net/docs/zh_CN/language.function.assign.tpl