PHP template engine Smarty built-in functions foreach, foreachelse Usage Analysis, smartyforeachelse

Last Update:2016-04-15 Source: Internet

Author: User

Tags php define php template

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

PHP template engine Smarty built-in functions foreach, foreachelse Usage Analysis, smartyforeachelse

This article describes the usage of the PHP template engine Smarty built-in functions foreach and foreachelse. We will share this with you for your reference. The details are as follows:

In the Smarty template, you can use foreach to repeat a block. In the template, an array needs to be allocated from PHP. This array can be a multi-dimensional array. The {foreach} tag in Smarty is the same as the foreach tag in PHP. The difference is that one of them is used in the template file, and the other is used in the PHP script. Therefore, the syntax is different. However, they all work the same way, that is, traversing the content in the array. The {foreachelse} tag is opposite to the {foreach} tag. The {foreachelse} tag is used to execute the content in the tag if the array is empty. The {foreach} and {/foreach} parameters in the template must appear in pairs. They have four parameters, in which the from and item parameters are necessary. For more information about its parameters, see the following list:

Attribute	Type	Required?	Default Value	Description
From	String	Yes	N/	Name of the array to be recycled
Item	String	Yes	N/	Variable name of the currently processed Element
Key	String	No	N/	Key name of the currently processed Element
Name	String	No	N/	The name of the loop to access.

We use an instance to demonstrate the use of {foreach} and {foreachelse} in Smarty.

Example: Get the content from the database, assign an array variable $ _ html, assign the array variable to the template, and then traverse the array in the template.

Test. SQL (SQL data used)

---- TABLE structure 'user' -- create table if not exists 'user' ('id' mediumint (8) unsigned not null auto_increment, 'username' varchar (50) not null, 'email 'varchar (50) not null, 'addtime' datetime not null default '2017-00-00 00:00:00 ', primary key ('id ')) ENGINE = InnoDB default charset = utf8 AUTO_INCREMENT = 7; ---- 'user' -- insert into 'user' ('id', 'username', 'email ', 'addtime') VALUES (1, 'ao', 'canjingkong @ sina.com.cn ', '2017-10-24 00:00:00 ', 'ymhd @ 163.com ', '2017-10-24 00:00:00'), (3, 'chimu qingzi', 'chimiqingzi @ yahoo.com, cn ', '2017-10-24 00:00:00 '), (4, 'Liu Chuan feng', 'lcfeng @ sina.com', '2017-00-00 00:00:00 '), (5, 'crayon shin ', 'labixiaoxin @ sina.com ', '2017-10-24 00:00:00'), (6, 'king Kong gourd wa ', 'jghlw @ sina.com', '2017-10-24 00:00:00 ');

Init. inc. php (template initialization file)

<? Php define ('root _ path', dirname (_ FILE _); // set the website ROOT directory require ROOT_PATH. '/libs/Smarty. class. php '; // load the Smarty template engine $ _ tpl = new Smarty (); // create an instance object $ _ tpl-> template_dir = ROOT_PATH. '/tpl/'; // specify the template directory $ _ tpl-> compile_dir = ROOT_PATH. '. /com/'; // specify the compilation directory $ _ tpl-> left_delimiter =' <{'; // re-specify the left delimiter $ _ tpl-> right_delimiter = '}>'; // re-specify the right delimiter?>

Index. php (main file)

<? Php require 'init. inc. php'; // introduce the template initialization file global $ _ tpl; $ _ mysqli = new mysqli (); // create a mysqli () object $ _ mysqli-> connect ('localhost', 'root', 'database password', 'database name'); // connect to the database, please set $ _ mysqli-> set_charset ('utf8'); // set the encoding $ _ result = $ _ mysqli-> query ("select username, email, addTime from user order by id asc "); $ _ html = array (); while (!! $ _ Row =$ _ result-> fetch_assoc () {$ _ html [] =$ _ row;} $ _ tpl-> assign ('data ', $ _ html); // allocate the array to the template $ _ tpl-> display ('index. tpl '); // introduce the template $ _ mysqli-> close (); // close the database and release resources?>

Tpl/index. tpl (template file of index. php In the main file)

<Html> 
Execution result:

Finally, the $ _ html array passed in index. php of the main file is a two-dimensional array. Reserved variable $ smarty. foreach is used based on the name attribute in the {foreach} tag. The reserved variable attributes used include: first (first record) and last (last record), iteration (always starts from 1 and increases by 1 for each execution), total (used to display the number of cycles)

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More