How to use php smarty template engine?

php How to use the smarty template engine: First, download and install it from the official website of Smarty; then set the members in the Smarty class library; finally, all access to Smarty can be based on variables.

php smarty template engine usage:

1. Overview:

Smarty is one of the many template engines in PHP. It is a class library written based on PHP.

Smarty’s advantages:

1. Optimize website access speed;

2. Separate 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, all others Deleting it is useless;

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

3. Default settings of Smarty class library

require After entering the Smarty.class.php file, if you need to modify the settings in the Smarty class library There are two ways to set members: one is to modify it directly in the Smarty.class.php file; the other is to re-specify it after initializing the class library, and the latter is generally used. The following describes the member attributes 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 are stored in the website. The default directory is templates_c

3. $config_dir: Define the directory used to store special configuration files for templates. Directory, 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 accesses in Smarty are Based on variables, the following is explained through an example.

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 to display.

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

init.inc.php
<?php
  define(&#39;ROOT_PATH&#39;, dirname(__FILE__)); //定义网站根目录
  require ROOT_PATH.&#39;/libs/Smarty.class.php&#39;; //载入 Smarty 文件
  $_tpl = new Smarty();      //实例化一个对象
  $_tpl->template_dir = ROOT_PATH.&#39;/tpl/&#39;; //重新设置模板目录为根目录下的 tpl 目录
  $_tpl->compile_dir = ROOT_PATH.&#39;./com/&#39;; //重新设置编译目录为根目录下的 com 目录
  $_tpl->left_delimiter = &#39;<{&#39;;   //重新设置左定界符为 &#39;<{&#39;
  $_tpl->right_delimiter = &#39;}>&#39;;    //重新设置左定界符为 &#39;}>&#39;
?>

Main fileindex.php

<?php
  require &#39;init.inc.php&#39;; //引入模板初始化文件
  require &#39;Persion.class.php&#39;; //载入对象文件
  global $_tpl;
  $title = &#39;This is a title!&#39;;
  $content = &#39;This is body content!&#39;;
  /*
  * 一、从 PHP 中分配给模板变量；
  * 动态的数据（PHP从数据库或文件，以及算法生成的变量）
  * 任何类型的数据都可以从PHP分配过来，主要包括如下
  * 标量：string、int、double、boolean
  * 复合：array、object
  *   NULL
  * 索引数组是直接通过索引来访问的
  * 关联数组，不是使用［关联下标］而是使用 . 下标的方式
  * 对象是直接通过->来访问的
  * */
  $_tpl->assign(&#39;title&#39;,$title);
  $_tpl->assign(&#39;content&#39;,$content); //变量的赋值
  $_tpl->assign(&#39;arr1&#39;,array(&#39;abc&#39;,&#39;def&#39;,&#39;ghi&#39;));  //索引数组的赋值
  $_tpl->assign(&#39;arr2&#39;,array(array(&#39;abc&#39;,&#39;def&#39;,&#39;ghi&#39;),array(&#39;jkl&#39;,&#39;mno&#39;,&#39;pqr&#39;))); //索引二维数组的赋值
  $_tpl->assign(&#39;arr3&#39;,array(&#39;one&#39;=>&#39;111&#39;,&#39;two&#39;=>&#39;222&#39;,&#39;three&#39;=>&#39;333&#39;)); //关联数组的赋值
  $_tpl->assign(&#39;arr4&#39;,array(&#39;one&#39;=>array(&#39;one&#39;=>&#39;111&#39;,&#39;two&#39;=>&#39;222&#39;),&#39;two&#39;=>array(&#39;three&#39;=>&#39;333&#39;,&#39;four&#39;=>&#39;444&#39;))); //关联二维数组的赋值
  $_tpl->assign(&#39;arr5&#39;,array(&#39;one&#39;=>array(&#39;111&#39;,&#39;222&#39;),array(&#39;three&#39;=>&#39;333&#39;,&#39;444&#39;))); //关联和索引混合数组的赋值
  $_tpl->assign(&#39;object&#39;,new Persion(&#39;小易&#39;, 10)); //对象赋值
  //Smarty 中数值也可以进行运算(+-*/^……)
  $_tpl->assign(&#39;num1&#39;,10);
  $_tpl->assign(&#39;num2&#39;,20);
  $_tpl->display(&#39;index.tpl&#39;);
?>

Main file Template file of index.phpindex.tpl (shelved in /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><{$title}></title>
  </head>  <body>
    变量的访问：<{$content}>
    <br />
    索引数组的访问：<{$arr1[0]}> <{$arr1[1]}> <{$arr1[2]}>
    <br />
    索引二维数组的访问： <{$arr2[0][0]}> <{$arr2[0][1]}> <{$arr2[0][2]}> <{$arr2[1][0]}> <{$arr2[1][1]}> <{$arr2[1][2]}>
    <br />
    关联数组的访问：<{$arr3.one}> <{$arr3.two}> <{$arr3.three}>
    <br />
    关联二维数组的访问：<{$arr4.one.one}> <{$arr4.one.two}> <{$arr4.two.three}> <{$arr4.two.four}>
    <br />
    关联和索引混合数组的访问：<{$arr5.one[0]}> <{$arr5.one[1]}> <{$arr5[0].three}> <{$arr5[0][0]}>
    <br />
    对象中成员变量的访问：<{$object->name}> <{$object->age}>
    <br />
    对象中方法的访问：<{$object->hello()}>
    <br />
    变量的运算：<{$num1+$num2}>
    <br />
    变量的混合运算：<{$num1+$num2*$num2/$num1+44}>
    <br />
  </body>
</html>

Persion.class. php

<?php
  class Persion {
   public $name; //为了访问方便，设定为public
   public $age;
   //定义一个构造方法
   public function __construct($name,$age) {
     $this->name = $name;
     $this->age = $age;
   }
   //定义一个 hello() 方法，输出名字和年龄
   public function hello() {
     return &#39;您好！我叫&#39;.$this->name.&#39;，今年&#39;.$this->age.&#39;岁了。&#39;;
   }
 }
?>

Execution results:

变量的访问：This is body content!
索引数组的访问：abc def ghi
索引二维数组的访问： abc def ghi jkl mno pqr
关联数组的访问：111 222 333
关联二维数组的访问：111 222 333 444
关联和索引混合数组的访问：111 222 333 444
对象中成员变量的访问：小易 10
对象中方法的访问：您好！我叫小易，今年10岁了。
变量的运算：30
变量的混合运算：94

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