The example in this article describes the usage of smarty loop nesting. Share it with everyone for your reference, the details are as follows:
test3.php:
<?php
require "main.php";
$forum = array(
array("category_id" => 1, "category_name" => "公告区",
"topic" => array(
array("topic_id" => 1, "topic_name" => "站务公告")
)
),
array("category_id" => 2, "category_name" => "文学专区",
"topic" => array(
array("topic_id" => 2, "topic_name" => "好书介绍"),
array("topic_id" => 3, "topic_name" => "奇文共赏")
)
),
array("category_id" => 3, "category_name" => "电脑专区",
"topic" => array(
array("topic_id" => 4, "topic_name" => "硬件周边"),
array("topic_id" => 5, "topic_name" => "软件讨论")
)
)
);
$tpl->assign("forum", $forum);
$tpl->display("test3.htm");
?>
The sample writing method is as follows:
templates/test3.htm:
<html>
<head>
<title>循环嵌套测试</title>
</head>
<body>
<table width="200" border="0" align="center" cellpadding="3" cellspacing="0">
<{section name=sec1 loop=$forum}>
<tr>
<td colspan="2"><{$forum[sec1].category_name}></td>
</tr>
<{section name=sec2 loop=$forum[sec1].topic}>
<tr>
<td width="25"> </td>
<td width="164"><{$forum[sec1].topic[sec2].topic_name}></td>
</tr>
<{/section}>
<{/section}>
</table>
</body>
</html>
test2.php:
<?php
require_once('./include/db_fns.php');
include_once("./Smarty/libs/Smarty.class.php"); //包含Smarty类文件
$smarty = new Smarty(); //建立Smarty实例对象$Smarty
$smarty->template_dir = "./templates/dedecms";//设置模板目录
$smarty->compile_dir = "templates/templates_c"; //设置编译目录
$smarty->assign("template_url", "./");
$smarty->assign("$site_url", "http://www.php.net/");
$smarty->assign("$site_name", "文章管理系统");
$smarty->left_delimiter = "<{"; //设置左边界符
$smarty->right_delimiter = "}>"; //设置右边界符
$db_conn = db_connect();
$query = "SELECT cat_ID,cat_name FROM categories ORDER BY cat_ID DESC";
$result = mysql_query($query);
$i = 5;
while(($row = mysql_fetch_array($result)) && $i > 0)
{
$query2="SELECT ID, post_title, post_date
FROM post
WHERE post.post_category =$row[cat_ID]
AND post_status <> 'unpbulish'
ORDER BY post_date DESC";
$result2=mysql_query($query2);
$i = 5;
while(($row2 = mysql_fetch_array($result2)) && $i > 0)
{
$row2[post_date]=date('m-d',strtotime($row2[post_date]));
$category = array("cat_ID"=>"$row[cat_ID]","cat_name"=>"$row[cat_name]",
"post"=>array("ID"=>"$row2[ID]",
"post_title"=>"$row2[post_title]" ,
"post_category"=>"$row2[post_category]" ,
"post_date"=>"$row2[post_date]"));
$i--;
}
}
$smarty->assign("forum", $category);
$smarty->display("test2.htm");
?>
test2.htm：
<html>
<head>
<title>嵌套循环测试</title>
</head>
<body>
<table width="200" border="0" align="center" cellpadding="3" cellspacing="0">
<{section name=sec1 loop=$forum}>
<tr>
<td colspan="2"><{$forum[sec1].cat_id}></td>
</tr>
<{section name=sec2 loop=$forum[sec1].post}>
<tr>
<td width="25"> </td>
<td width="164"><{$forum[sec1].post[sec2].post_title}></td>
</tr>
<{/section}>
<{/section}>
</table>
</body>
</html>
test4.php:
<?php
require "main.php";
$my_array = array(
array("value" => "0"),
array("value" => "1"),
array("value" => "2"),
array("value" => "3"),
array("value" => "4"),
array("value" => "5"),
array("value" => "6"),
array("value" => "7"),
array("value" => "8"),
array("value" => "9"));
$tpl->assign("my_array", $my_array);
$tpl->display('test4.htm');
?>
The template is written as follows:
templates/test4.htm:
<html>
<head>
<title>横向重复表格测试</title>
</head>
<body>
<table width="500" border="1" cellspacing="0" cellpadding="3">
<tr>
<{section name=sec1 loop=$my_array}>
<td><{$my_array[sec1].value}></td>
<{if $smarty.section.sec1.rownum is div by 2}>
</tr>
<tr>
<{/if}>
<{/section}>
</tr>
</table>
</body>
</html>
The key point is the Smarty variable $smarty.section.sec1.rownum. In the section loop, this variable will get the index value starting from 1, so when rownum can be divided by 2, it will output
Operators include the following:
eq, ne, neq, gt, lt, lte, le, gte, ge, is even, is odd, is not even, is not odd, not, mod, div by, even by, odd by
Example:
<!--{if $bigsize ge '650'}-->
<img src="/static/imghwm/default1.png" data-src="photo/<!--{$photo}-- alt="Smarty loop nesting usage example analysis_php example" >" class="lazy" border="0" width="650" class="product_photo" />
<!--{else}-->
<img src="/static/imghwm/default1.png" data-src="photo/<!--{$photo}-- alt="Smarty loop nesting usage example analysis_php example" >" class="lazy" border="0" class="product_photo" />
<!--{/if}-->
I didn’t use smarty often in the past, but a friend’s website needs to be modified in the past two days. I tried it out, and it’s quite interesting.
Instructions about capture:
The function of the capture function is to collect the data output by the template into a variable instead of outputting them to the page.
Any data between {capture name="foo"} and {/capture} is received into the variable specified by the function's name attribute ($foo).
The collected information can be used in the special variable $smarty.
For example, capture.foo collects the above data. If the function does not have a name attribute, "default" will be used.
Each {capture} must correspond to {/capture}, and the capture function cannot be nested.
Readers who are interested in more Smarty-related content can check out the special topics on this site: "Basic Tutorial for Getting Started with Smarty Templates", "Summary of PHP Template Technology", "Summary of PHP Database Operation Skills Based on PDO", "Summary of PHP Operations and Operator Usage" ", "Summary of PHP Network Programming Skills", "Introduction Tutorial on PHP Basic Syntax", "Introduction Tutorial on PHP Object-Oriented Programming", "Summary of PHP String Usage", "Introduction Tutorial on PHP+MySQL Database Operation" and " Summary of common database operation skills in PHP》
I hope this article will be helpful to everyone’s PHP program design based on smarty templates.
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