首先我是用过codeigniter的，刚开始学框架的时候用过一阵子，然后后来公司用thinkphp，就没再用了，用了2个之后，就会有一些对比性。首先这2个框架文件夹容量都比较大，称不上轻量级之类的，我都不怎么看好。
今天单说codeigniter框架
举个官网控制器调用模板的例子
<?phpclass Blog extends CI_Controller { function index() { $data['title'] = "My Real Title"; $data['heading'] = "My Real Heading"; $this->load->view('blogview', $data); }}?> <html><head><title><?php echo $title;?></title></head><body> <h1><?php echo $heading;?></h1></body></html>
感觉这种模式很不好，难道这就是传说中的控制器模板分离？这种模式只能忽悠刚刚入门的那些PHPer，先不论调用smarty之类的来反驳我，只是说他的自身特性，而且什么框架都能结合smarty来用。
以上的代码用PHP的一个函数就能实现了，请查阅extract函数的用法。
很多用codeigniter的PHPer估计就是冲着所谓写法优美去的，可以用连贯写法-> ->
究其实质，并没有对模板（视图）产生有多大的作用，
只是把变量全部先计算出来，换个名称，再在需要的时候，把新名称填入到所需地方。
然后个人在国外网站闲逛的时候呢，发现一个模板，它和codeigniter的这种模式有很大的相似性。模板名未知，就叫他template吧。你们可以看看，就可以对codeigniter原理有大致的了解吧
它的核心模板代码我写一下
<?php//template.php/** * Copyright (c) 2003 Brian E. Lozier (brian@massassi.net) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. */class Template { var $vars; /// Holds all the template variables var $path; /// Path to the templates /** * Constructor * * @param string $path the path to the templates * * @return void */ function Template($path = null) { $this->path = $path; } /** * Set the path to the template files. * * @param string $path path to template files * * @return void */ function set_path($path) { $this->path = $path; } /** * Set a template variable. * * @param string $name name of the variable to set * @param mixed $value the value of the variable * * @return void */ function set($name, $value) { $this->vars[$name] = $value; } /** * Open, parse, and return the template file. * * @param string string the template file name * * @return string */ function fetch($file) { extract($this->vars); // Extract the vars to local namespace ob_start(); // Start output buffering include($this->path . $file); // Include the file $contents = ob_get_contents(); // Get the contents of the buffer ob_end_clean(); // End buffering and discard return $contents; // Return the contents }}/** * An extension to Template that provides automatic caching of * template contents. */class CachedTemplate extends Template { var $cache_id; var $expire; var $cached; /** * Constructor. * * @param string $path path to template files * @param string $cache_id unique cache identifier * @param int $expire number of seconds the cache will live * * @return void */ function CachedTemplate($path, $cache_id = null, $expire = 900) { $this->Template($path); $this->cache_id = $cache_id ? 'cache/' . md5($cache_id) : $cache_id; $this->expire = $expire; } /** * Test to see whether the currently loaded cache_id has a valid * corrosponding cache file. * * @return bool */ function is_cached() { if($this->cached) return true; // Passed a cache_id? if(!$this->cache_id) return false; // Cache file exists? if(!file_exists($this->cache_id)) return false; // Can get the time of the file? if(!($mtime = filemtime($this->cache_id))) return false; // Cache expired? if(($mtime + $this->expire) < time()) { @unlink($this->cache_id); return false; } else { /** * Cache the results of this is_cached() call. Why? So * we don't have to double the overhead for each template. * If we didn't cache, it would be hitting the file system * twice as much (file_exists() & filemtime() [twice each]). */ $this->cached = true; return true; } } /** * This function returns a cached copy of a template (if it exists), * otherwise, it parses it as normal and caches the content. * * @param $file string the template file * * @return string */ function fetch_cache($file) { if($this->is_cached()) { $fp = @fopen($this->cache_id, 'r'); $contents = fread($fp, filesize($this->cache_id)); fclose($fp); return $contents; } else { $contents = $this->fetch($file); // Write the cache if($fp = @fopen($this->cache_id, 'w')) { fwrite($fp, $contents); fclose($fp); } else { die('Unable to write cache.'); } return $contents; } }}?> 在该核心模板类中，同样用的是extract($this->vars); 函数来拆数组。
我们看他的“控制器”用法
<?php//user_list.phprequire_once('template.php');/** * This variable holds the file system path to all our template files. */$path = './templates/';/** * Create a template object for the outer template and set its variables. */$tpl = & new Template($path);$tpl->set('title', 'User List');/** * Create a template object for the inner template and set its variables. The * fetch_user_list() function simply returns an array of users. */$body = & new Template($path);$body->set('user_list', fetch_user_list());/** * Set the fetched template of the inner template to the 'body' variable in * the outer template. */$tpl->set('body', $body->fetch('user_list.tpl.php')); //这个是直接调用模板/** * Echo the results. */echo $tpl->fetch('index.tpl.php');/** * Just a function to simulate the retrieval of a user list. */function fetch_user_list() { return array( array('id' => 1, 'name' => 'bob', 'email' => 'bob@mozilla.org', 'banned' => false), array('id' => 2, 'name' => 'judy', 'email' => 'judy@php.net', 'banned' => false), array('id' => 3, 'name' => 'joe', 'email' => 'joe@opera.com', 'banned' => false), array('id' => 4, 'name' => 'billy', 'email' => 'billy@wakeside.com', 'banned' => true), array('id' => 5, 'name' => 'eileen', 'email' => 'eileen@slashdot.org', 'banned' => false));}?> set就是赋值了。然后看它的“视图”是怎么输出的，就基本上完全和codeigniter类似了
//index.tpl.php<html> <head> <title><?=$title;?></title> </head> <body> <h2><?=$title;?></h2><?=$body;?> </body></html>
//user_list.tpl.php<table> <tr> <th>Id</th> <th>Name</th> <th>Email</th> <th>Banned</th> </tr><? foreach($user_list as $user): ?> <tr> <td align="center"><?=$user['id'];?></td> <td><?=$user['name'];?></td> <td><a href="mailto:<?=$user['email'];?>"><?=$user['email'];?></a></td> <td align="center"><?=($user['banned'] ? 'X' : ' ');?></td> </tr><? endforeach; ?></table>
详细的下载地址： http://download.csdn.net/detail/xjl756425616/3984218
回复讨论(解决方案)
Copyright (c) 2003 ....
十年了！！！
就因为今天第 四月一号 吗？
LZ推荐几个框架呗！~
php amp
你怎么看
Copyright (c) 2003 ....
十年了！！！
就因为今天第 四月一号 吗？
技术跟日期有什么关系？只是觉得和codeigniter的方式很类似~
LZ推荐几个框架呗！~
没什么推荐呀~我就用过那2个，缺乏全面的对比性。
//template.php
/**
* Copyright (c) 2003 Brian E. Lozier (brian@massassi.net)
codeigniter 不是模板引擎
既然是框架，当然他也有自己的模板引擎
10年前的东西，过于陈旧了
你不也想着标新立异吗？
4.1 愚人节
php amp
你怎么看
你这个template与ci的有什么不同？
模板说到底，还不是ob＋extract？
php amp
你怎么看
看了，没啥好评论的，和那个模板引擎类似
推荐ci，是ci容易上手，模板，不都是差不多么，
其实框架没有对错,看需求.比如我现在公司项目紧急,来的都是新人,能力参差不齐.CI框架就很适合,有框架使用经验的,用这玩意1,2天基本就能上手开发.
不过,局限性也很明显 ...
我个人认为CI还是蛮好的，mvc分工明细，代码简单清晰明了
CI还可以吧，我一直在用也没发现有什么问题。
php amp
你怎么看
看了，没啥好评论的，和那个模板引擎类似
extra 没有什么不对的，因为99%的框架都是这样来进行模板解析的，比如yii2：
public function renderPhpFile($_file_, $_params_ = []) { ob_start(); ob_implicit_flush(false); extract($_params_, EXTR_OVERWRITE); require($_file_); return ob_get_clean(); } 有的甚至用 eval()，比如 dedecms。。。。。。。。。。。。。
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