Smarty loop nesting usage example analysis_php example
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 $smarty.section.sec1.rownum. In the section loop, this variable will get the index value starting from 1, so when rownum can be divided by 2, it will output Operators include the following: eq, ne, neq, gt, lt, lte, le, gte, ge, is even, is odd, is not even, is not odd, not, mod, div by, even by, odd by Example: I didn’t use smarty often in the past, but a friend’s website needs to be modified in the past two days. I tried it out, and it’s quite interesting. Instructions about capture: The function of the capture function is to collect the data output by the template into a variable instead of outputting them to the page. Any data between {capture name="foo"} and {/capture} is received into the variable specified by the function's name attribute ($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. AI-powered app for creating realistic nude photos Online AI tool for removing clothes from photos. 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In this article, we'll walk you through the process of building nested tables in HTML, with meticulously detailed explanations complete with illustrations to help you understand the concepts more effectively. Whether you are a newbie or an experienced web designer, this article will provide you with the knowledge and expertise you need to become proficient in creating nested tables using HTML. Before we start exploring making nested tables, it's necessary to understand the basic makeup of HTML tables. HTML tables are implemented through the <table> element. Lambda expression breaks out of the loop, specific code examples are needed. In programming, the loop structure is an important syntax that is often used. However, in certain circumstances, we may want to break out of the entire loop when a certain condition is met within the loop body, rather than just terminating the current loop iteration. At this time, the characteristics of lambda expressions can help us achieve the goal of jumping out of the loop. Lambda expression is a way to declare an anonymous function, which can define simple function logic internally. It is different from an ordinary function declaration, Note: This article compares loops and recursion from the perspective of Go language. When writing programs, you often encounter situations where a series of data or operations need to be processed repeatedly. To achieve this we need to use loops or recursion. Loops and recursions are both commonly used processing methods, but in practical applications, they each have advantages and disadvantages, so the actual situation needs to be considered when choosing which method to use. This article will conduct a comparative study of loops and recursion in the Go language. 1. Loops A loop is a mechanism that repeatedly executes a certain piece of code. There are three main types of Go language Nested exception handling is implemented in C++ through nested try-catch blocks, allowing new exceptions to be raised within the exception handler. The nested try-catch steps are as follows: 1. The outer try-catch block handles all exceptions, including those thrown by the inner exception handler. 2. The inner try-catch block handles specific types of exceptions, and if an out-of-scope exception occurs, control is given to the external exception handler. This article will explain in detail how PHP returns all the values of an array to form an array. The editor thinks it is quite practical, so I share it with you as a reference. I hope you can gain something after reading this article. Using the array_values() function The array_values() function returns an array of all the values in an array. It does not preserve the keys of the original array. $array=["foo"=>"bar","baz"=>"qux"];$values=array_values($array);//$values will be ["bar","qux"]Using a loop can Use a loop to manually get all the values of the array and add them to a new Iterator interface The Iterator interface is an interface used to traverse collections. It provides several methods, including hasNext(), next() and remove(). The hasNext() method returns a Boolean value indicating whether there is a next element in the collection. The next() method returns the next element in the collection and removes it from the collection. The remove() method removes the current element from the collection. The following code example demonstrates how to use the Iterator interface to iterate over a collection: Listnames=Arrays.asList("John","Mary","Bob");Iterator in back). So the number 2 is the number of records we want to present in a column. You can use this to change other different presentation methods.
<!--{if $bigsize ge '650'}-->
<img src="photo/<!--{$photo}-->" border="0" width="650" class="product_photo" />
<!--{else}-->
<img src="photo/<!--{$photo}-->" border="0" class="product_photo" />
<!--{/if}-->
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