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php—Smarty-1 (18),phpsmarty-118

smarty

一、模板原理

1、  为什么使用模板

1)  场景:

for($i=0;$i

       echo ‘

’.$row[‘proname’].’

}

以上这种写法将html与php进行混编,不利于开发和维护

2)  场景:

我们现在开发了一个网站,经过一段时间的运营,客户对前台不满意,我们又开发一套界面,但运行之后,客户认为之前的样式比较好,经常更换网站样式

解决以上两个问题的最好办法,就是使用模板

2、  模板的具体实现

模板的实现其实就是字符串替换

1)  例1

模板文件:

 

PHP文件:

1)  例2:

Template类:

PHP代码:

 

上面的类文件中的代码,不够优化,我们可以使用比较流行的模板框架来实现自己的项目

二、Smarty简介

1、  什么是Smarty

Smarty是一个基于PHP开发的PHP模板引擎。它提供了逻辑与外在内容的分离。

2、  Smarty的特点

l  速度

l  编译型

l  缓存技术

l  插件技术

l  语句自由 if/elseif/else/endif

l  实时更新 :实时性要求比较高

3、  配置

l  http://smarty.php.net

l  /lib

l  Smarty 2.6       php4.0

l  Smarty 3.0       php5.0

 1 解压smarty,进入解压目录

Demo:案例

Libs:Smarty源代码

1)  进入libs目录,

Plugins:自定义插件目录

Sysplugins:系统插件目录

Debug.tpl :在Smarty中,有调试功能,可以观察变量的值 ,调试窗口模板

Smarty.class.php:Smarty核心类文件(入口文件)

SmartyBC.class.php :Smarty3.0在2.0的基础上进行了升级,如果想使用2.0的功能,可以引用这个入口文件

3)将libs目录复制到项目中,并重命名

三、 快速入门

1、  代码实现:

模板代码:

{$name}、{$age} :模板标记变量

程序代码:

2、  smarty工作原理:

l  smarty将php源文件,首先编译成中间文件

l  如果启用缓存,再根据编译文件生成缓存文件

l  之后的每次访问都会访问编译文件

l  如果启用缓存且有缓存文件而且没有过期,则直接访问缓存文件

Smarty第一次运行某个程序时,会将这个程序生成一个编译文件

以后,每次运行这个程序时,只要模板没有改变,就直接运行这个编译文件,如果模板改变了,就重新生成编译文件,再去运行。

编译是指针对模板的编译

3、  原理图:

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/993275.htmlTechArticlephp—Smarty-1 (18),phpsmarty-118 smarty 一、模板原理 1、 为什么使用模板 1) 场景: for($i=0;$i$count;$i++){ echo td.$row[proname]./td } 以上这种写法将...
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