是一款很优秀的轻量级MVC框架，而是目前最流行的php模板框架。两者配合起来使用，加快开发效率。
第一步：安装CodeIgniter
解压后，复制文件夹下面的application、system、index.php至项目根目录中
第二步：安装Smarty
在CodeIgniter的application目录下的third_party目录中新建一个名为smarty的目录，将解压出来的libs包复制到该目录中。
第三步：创建模板目录
在application目录的views目录中创建两个文件夹templates、templates_c
第四步：编写安装代码
我是从 下载的代码，但可能版本问题，并不能直接拿来使用，我修改了部分代码。
Smarty.php(复制至appliction/libraries目录中)
1:
2:
3:/**
4: * Smarty Class
5: *
6: * @package CodeIgniter
7: * @subpackage Libraries
8: * @category Smarty
9: * @author Kepler Gelotte
10: * @link http://www.coolphptools.com/codeigniter-smarty
11: */
12://require_once( BASEPATH.'libs/smarty/libs/Smarty.class.php' );
13:require_once( APPPATH.'third_party/smarty/libs/Smarty.class.php' );
14:
15:class CI_Smarty extends Smarty { 16:
17:function CI_Smarty()
18: { 19:parent::Smarty();
20:
21: $this->compile_dir = APPPATH . "views/templates_c";
22: $this->template_dir = APPPATH . "views/templates";
23: $this->assign( 'APPPATH', APPPATH );
24: $this->assign( 'BASEPATH', BASEPATH );
25:
26: log_message('debug', "Smarty Class Initialized"); 27: }
28:
29:function __construct()
30: { 31:parent::__construct();
32:
33: $this->compile_dir = APPPATH . "views/templates_c";
34: $this->template_dir = APPPATH . "views/templates";
35: $this->assign( 'APPPATH', APPPATH );
36: $this->assign( 'BASEPATH', BASEPATH );
37:
38:// Assign CodeIgniter object by reference to CI
39:if ( method_exists( $this, 'assignByRef') )
40: { 41: $ci =& get_instance();
42: $this->assignByRef("ci", $ci); 43: }
44:
45: log_message('debug', "Smarty Class Initialized"); 46: }
47:
48:
49:/**
50: * Parse a template using the Smarty engine
51: *
52: * This is a convenience method that combines assign() and
53: * display() into one step.
54: *
55: * Values to assign are passed in an associative array of
56: * name => value pairs.
57: *
58: * If the output is to be returned as a string to the caller
59: * instead of being output, pass true as the third parameter.
60: *
61: * @access public
62: * @param string
63: * @param array
64: * @param bool
65: * @return string
66: */
67:function view($template, $data = array(), $return = FALSE)
68: { 69:foreach ($data as $key => $val)
70: { 71: $this->assign($key, $val);
72: }
73:
74:if ($return == FALSE)
75: { 76: $CI =& get_instance();
77:if (method_exists( $CI->output, 'set_output' ))
78: { 79: $CI->output->set_output( $this->fetch($template) );
80: }
81:else
82: { 83: $CI->output->final_output = $this->fetch($template);
84: }
85:return;
86: }
87:else
88: { 89:return $this->fetch($template);
90: }
91: }
92: }
93:// END Smarty Class
第五步：更新CodeIgniter配置
关于CodeIgniter的配置，豆瓣上有一篇别人写的日记。
这里只是修改application/config/autoload.php文件中的libraries项，让页面自动载入smarty。如果不在这里配置，只需在要用到smarty的地方显示调用$this->load->library(‘smarty’);
第六步：运行实例
默认的例子是直接访问你的域名，比如这里meteoric001.com/
或者使用：
meteoric001.com/index.php/welcome/
meteoric001.com/index.php/welcome
meteoric001.com/index.php/welcome/index
关于url的设计，可以参考CodeIgniter的用户指南
URL里面带个index.php可能不太好看，这里修改一下服务器配置（nginx为例）
最后写一个名叫example的例子，运行效果
application/controllers/example.php
1:
2:class Example extends Controller { 3:
4:function Example()
5: { 6:parent::Controller();
7:
8:// $this->load->helper(array('form', 'url')); 9: $this->load->library('form_validation'); 10: $this->form_validation->set_error_delimiters(' ', ' '); 11: }
12:
13:function index()
14: { 15:// This example is taken from the Smarty demo and modified slightly
16: $this->smarty->assign("Name","Fred Irving Johnathan Bradley Peppergill"); 17: $this->smarty->assign("FirstName",array("John","Mary","James","Henry")); 18: $this->smarty->assign("LastName",array("Doe","Smith","Johnson","Case")); 19: $this->smarty->assign("Class",array(array("A","B","C","D"), array("E", "F", "G", "H"), array("I", "J", "K", "L"), array("M", "N", "O", "P"))); 20:
21: $this->smarty->assign("contacts", array(array("phone" => "555-1234", "fax" => "555-2345", "cell" => "999-9999"), array("phone" => "555-4444", "fax" => "555-3333", "cell" => "888-8888"))); 22:
23: $this->smarty->assign("state_values", array( 'AL', 'AK', 'AZ', 'AR', 'CA', 'CO', 'CT', 'DE', 'FL', 'GA', 'HI', 'ID', 'IL', 'IN', 'IA', 'KS', 'KY', 'LA', 'ME', 'MD', 'MA', 'MI', 'MN', 'MS', 'MO', 'MT', 'NE', 'NV', 'NH', 'NJ', 'NM', 'NY', 'NC', 'ND', 'OH', 'OK', 'OR', 'PA', 'RI', 'SC', 'SD', 'TN', 'TX', 'UT', 'VT', 'VA', 'WA', 'WV', 'WI', 'WY' )); 24: $this->smarty->assign("state_output", array( 'Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming' )); 25:
26:// english is the default if you don't set lang
27: $this->smarty->assign("lang", "english"); 28:
29:// Set the validation rules if this is a submit
30:if ( $this->input->post('action') == 'submit' ) 31: { 32: $this->form_validation->set_rules('username', 'Username', 'trim|required|min_length[5]|max_length[12]|xss_clean'); 33: $this->form_validation->set_rules('password', 'Password', 'trim|required|matches[passconf]|md5'); 34: $this->form_validation->set_rules('passconf', 'Password Confirmation', 'trim|required'); 35: $this->form_validation->set_rules('email', 'Email', 'trim|required|valid_email'); 36: $this->form_validation->set_rules('state', 'State', ''); 37:
38:if ( ! $this->form_validation->run() )
39: { 40: $data['error'] = 'Check and fix the form errors below';
41: }
42:else
43: { 44: $data['message'] = 'Thanks for posting!';
45: }
46: }
47:
48:// These assignments are passed by the associative array
49: $data['title'] = 'Welcome to the Smarty Website';
50: $data['bold'] = true;
51: $data['ip_address'] = $this->input->server('REMOTE_ADDR'); 52:
53:// Calling the convenience function view() that allows passing data
54: $this->smarty->view( 'example.tpl', $data );
55: }
56: }
另外一个页面模板：
example的代码可以从这里下载，需要适当做一些修改。
本文参考：