Examples of how to use variables in PHP template engine Smarty, template smarty

This article describes how to use variables in PHP template engine Smarty. Share it with everyone for your reference, the details are as follows:

1. Overview:

Smarty is one of many template engines for PHP. It is a class library written in PHP.
Advantages of Smarty:
1. Optimize website access speed;
2. Separation of web front-end design and program;

2. Smarty installation

1. You need to download the latest Smarty version from Smarty’s official website http://www.smarty.net/download.php. For example, the downloaded version is: Smarty-2.6.18.tar.tar;

2. Unzip the Smarty-2.6.18.tar.tar compressed package and you will find many files and folders. Except for the libs folder, it is useless to delete all others;

3. When calling the Smarty template engine, you should first use PHP's require statement to load the file libs/Smarty.class.php.

3. Default settings of Smarty class library

require After entering the Smarty.class.php file, if you need to set the members in the Smarty class library, there are two methods: one is to modify it directly in the Smarty.class.php file; the other is to initialize the class The library is respecified later, generally using the latter. The following is a description of the member properties in the Smarty class library:

1. $template_dir: Set the directory where template files in the website are stored. The default directory is templates
2. $compile_dir: Set the directory where compiled files in the website are stored. The default directory is templates_c
3. $config_dir: Defines the directory used to store special configuration files for templates. The default is configs
4. $left_delimiter: used for the left terminator variable in the template, the default is '{'
5. $right_delimiter: used for the right terminator variable in the template, the default is '}'

4. Use of variables:

All access in Smarty is based on variables. The following is an example to illustrate.

Example idea: The main file introduces the template initialization configuration file (init.inc.php) and a class, and assigns values ??to the variables in the template.

First, set the init.inc.php file as the initialization configuration file of the Smarty template
init.inc.php

<&#63;php
  define('ROOT_PATH', dirname(__FILE__)); //定義網(wǎng)站根目錄
  require ROOT_PATH.'/libs/Smarty.class.php'; //載入 Smarty 文件
  $_tpl = new Smarty();      //實例化一個對象
  $_tpl->template_dir = ROOT_PATH.'/tpl/'; //重新設(shè)置模板目錄為根目錄下的 tpl 目錄
  $_tpl->compile_dir = ROOT_PATH.'./com/'; //重新設(shè)置編譯目錄為根目錄下的 com 目錄
  $_tpl->left_delimiter = '<{';   //重新設(shè)置左定界符為 '<{'
  $_tpl->right_delimiter = '}>';    //重新設(shè)置左定界符為 '}>'
&#63;>

Main file index.php

<&#63;php
  require 'init.inc.php'; //引入模板初始化文件
  require 'Persion.class.php'; //載入對象文件
  global $_tpl;
  $title = 'This is a title!';
  $content = 'This is body content!';
  /*
  * 一、從 PHP 中分配給模板變量；
  * 動態(tài)的數(shù)據(jù)（PHP從數(shù)據(jù)庫或文件，以及算法生成的變量）
  * 任何類型的數(shù)據(jù)都可以從PHP分配過來，主要包括如下
  * 標(biāo)量：string、int、double、boolean
  * 復(fù)合：array、object
  *   NULL
  * 索引數(shù)組是直接通過索引來訪問的
  * 關(guān)聯(lián)數(shù)組，不是使用［關(guān)聯(lián)下標(biāo)］而是使用 . 下標(biāo)的方式
  * 對象是直接通過->來訪問的
  * */
  $_tpl->assign('title',$title);
  $_tpl->assign('content',$content); //變量的賦值
  $_tpl->assign('arr1',array('abc','def','ghi'));  //索引數(shù)組的賦值
  $_tpl->assign('arr2',array(array('abc','def','ghi'),array('jkl','mno','pqr'))); //索引二維數(shù)組的賦值
  $_tpl->assign('arr3',array('one'=>'111','two'=>'222','three'=>'333')); //關(guān)聯(lián)數(shù)組的賦值
  $_tpl->assign('arr4',array('one'=>array('one'=>'111','two'=>'222'),'two'=>array('three'=>'333','four'=>'444'))); //關(guān)聯(lián)二維數(shù)組的賦值
  $_tpl->assign('arr5',array('one'=>array('111','222'),array('three'=>'333','444'))); //關(guān)聯(lián)和索引混合數(shù)組的賦值
  $_tpl->assign('object',new Persion('小易', 10)); //對象賦值
  //Smarty 中數(shù)值也可以進行運算(+-*/^……)
  $_tpl->assign('num1',10);
  $_tpl->assign('num2',20);
  $_tpl->display('index.tpl');
&#63;>

The template file index.tpl of the main file index.php (stored in the /tpl/ directory)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title><{$title}></title>
  </head>  <body>
    變量的訪問：<{$content}>
    <br />
    索引數(shù)組的訪問：<{$arr1[0]}> <{$arr1[1]}> <{$arr1[2]}>
    <br />
    索引二維數(shù)組的訪問： <{$arr2[0][0]}> <{$arr2[0][1]}> <{$arr2[0][2]}> <{$arr2[1][0]}> <{$arr2[1][1]}> <{$arr2[1][2]}>
    <br />
    關(guān)聯(lián)數(shù)組的訪問：<{$arr3.one}> <{$arr3.two}> <{$arr3.three}>
    <br />
    關(guān)聯(lián)二維數(shù)組的訪問：<{$arr4.one.one}> <{$arr4.one.two}> <{$arr4.two.three}> <{$arr4.two.four}>
    <br />
    關(guān)聯(lián)和索引混合數(shù)組的訪問：<{$arr5.one[0]}> <{$arr5.one[1]}> <{$arr5[0].three}> <{$arr5[0][0]}>
    <br />
    對象中成員變量的訪問：<{$object->name}> <{$object->age}>
    <br />
    對象中方法的訪問：<{$object->hello()}>
    <br />
    變量的運算：<{$num1+$num2}>
    <br />
    變量的混合運算：<{$num1+$num2*$num2/$num1+44}>
    <br />
  </body>
</html>

Persion.class.php

<&#63;php
  class Persion {
   public $name; //為了訪問方便，設(shè)定為public
   public $age;
   //定義一個構(gòu)造方法
   public function __construct($name,$age) {
     $this->name = $name;
     $this->age = $age;
   }
   //定義一個 hello() 方法，輸出名字和年齡
   public function hello() {
     return '您好！我叫'.$this->name.'，今年'.$this->age.'歲了。';
   }
 }
&#63;>

Execution result:

變量的訪問：This is body content!
索引數(shù)組的訪問：abc def ghi
索引二維數(shù)組的訪問： abc def ghi jkl mno pqr
關(guān)聯(lián)數(shù)組的訪問：111 222 333
關(guān)聯(lián)二維數(shù)組的訪問：111 222 333 444
關(guān)聯(lián)和索引混合數(shù)組的訪問：111 222 333 444
對象中成員變量的訪問：小易 10
對象中方法的訪問：您好！我叫小易，今年10歲了。
變量的運算：30
變量的混合運算：94

Readers who are interested in more PHP-related content can check out the special topics of this site: "Basic Tutorial for Getting Started with Smarty Templates", "Summary of PHP Template Technology", "Summary of PHP Database Operation Skills Based on PDO", "PHP Operations and Operators" Usage summary", "PHP network programming skills summary", "PHP basic syntax introductory tutorial", "php object-oriented programming introductory tutorial", "php string (string) usage summary", "php mysql database operation introductory tutorial" 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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