ci framework (1), ci framework (_PHP tutorial

ci framework (1), ci framework (

ci directory structure                                                                                                                      

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|-----<span>system</span><span>                框架程序目录  
    </span>|-----<span>core              框架的核心程序  
        </span>|-----CodeIgniter.<span>php   引导性文件  
        </span>|-----Common.<span>php    加载基类库的公共函数  
        </span>|-----Controller.<span>php    基控制器类文件：CI_Controller  
        </span>|-----Model.<span>php     基模型类文件：CI_Model  
        </span>|-----Config.<span>php    配置类文件：CI_Config  
        </span>|-----Input.<span>php     输入类文件：CI_Input  
        </span>|-----Output.<span>php    输出类文件：CI_Output  
        </span>|-----URL.<span>php       URL类文件：CI_URl  
        </span>|-----Router.<span>php    路由类文件：CI_Router  
        </span>|-----Loader.<span>php    加载类文件：CI_Loader  
    </span>|-----<span>helpers           辅助函数  
        </span>|-----url_helper.<span>php    url相关的辅助函数，如：创建url的辅助函数  
        </span>|-----captcha_helper.<span>php创建图形验证码的辅助函数  
    </span>|-----<span>libraries         通用类库  
        </span>|-----Pagination.<span>php    通用分页类库  
        </span>|-----Upload.<span>php    通用文件上传类库  
        </span>|-----Image_lib.<span>php 通用图像处理类库  
        </span>|-----Session.<span>php   通用session类库  
    </span>|-----<span>language          语言包  
    </span>|-----<span>database          数据库操作相关的程序  
        </span>|-----DB_active_rec.<span>php 快捷操作类文件(ActiveRecord)  
    </span>|-----<span>fonts             字库  
      
</span>|-----<span>application           项目目录  
    </span>|-----<span>core              项目的核心程序  
    </span>|-----<span>helpers           项目的辅助函数  
    </span>|-----<span>libraries         通用类库  
    </span>|-----<span>language          语言包  
    </span>|-----<span>config            项目相关的配置  
        </span>|-----config.<span>php    项目相关的配置文件     
        </span>|-----database.<span>php  数据库相关的配置文件  
        </span>|-----autoload.<span>php  设置自动加载类库的配置文件  
        </span>|-----constants.<span>php 常量配置文件  
        </span>|-----routes.<span>php    路由配置文件  
    </span>|-----<span>controllers       控制器目录  
        </span>|-----welcome.<span>php   控制器文件，继承CI_Controller  
    </span>|-----<span>models            模型目录  
        </span>|-----welcome_model.<span>php 模型文件，继承CI_Model  
    </span>|-----<span>views             视图目录  
        </span>|-----welcome.php   视图模板文件，默认后缀名为.<span>php  
    </span>|-----<span>cache             存放数据或模板的缓存文件  
    </span>|-----<span>errors            错误提示模板  
    </span>|-----<span>hooks             钩子，在不修改系统核心文件的基础上扩展系统功能  
    </span>|-----<span>third_party       第三方库  
    </span>|-----<span>logs              日志  
  
</span>|-----index.php             入口文件

Add function in applicationcontrollerswelcome.php:

Entry file.php/controller/action

<span>public</span> <span>function</span><span> hello()    
{    
    </span><span>echo</span> "test"<span>;   
}</span>

Create a new controller yourself, hello.php:

Note:

<?php <span>if</span> ( ! <span>defined</span>('BASEPATH')) <span>exit</span>('No direct script access allowed'<span>);

    </span><span>class</span> Hello <span>extends</span><span> CI_Controller 
    {
        </span><span>public</span> <span>function</span> sayHello(<span>$name</span><span>)
        {
            </span><span>echo</span> <span>$name</span>,",Hello World"<span>;
        }
    }
</span>?>

Method names starting with an underscore cannot be accessed successfully and can only be accessed indirectly.

Only public modified methods can be accessed.

• Try not to use methods with the same name as the class, as they will be treated as constructors.
• Loading view                                                                                         

applicationviewsview_test.php or applicationviewsviewtest.php (this method is mainly to facilitate the same type of views to be placed in the same folder for easy management)

Controller:

or:

<span><</span><span>html</span><span>></span>
<span><</span><span>head</span><span>></span>
<span></</span><span>head</span><span>></span>
<span><</span><span>body</span><span>></span><span>
test_ci_hello_world
</span><span></</span><span>body</span><span>></span>
<span></</span><span>html</span><span>></span>

Effect:

<span>public</span> <span>function</span><span> addView()
{
    </span><span>$this</span>->load->view("view_test"<span>);
}</span>

Assign variables                                                                                                                                                                    because

Transmit data from the controller to the view, controller:

<span>public</span> <span>function</span><span> addView2()
{
    </span><span>$this</span>->load->view("view/test"<span>);
}</span>

View:

Effect:

public

<span>public</span> <span>function</span><span> addView()
        {
            </span><span>$this</span>->load->vars("title","value"<span>);
            </span><span>$list</span> = <span>array</span><span>(
            </span><span>array</span>('id'=>1,'name'=>'jack','email'=>'123@123.com'),
            <span>array</span>('id'=>2,'name'=>'jack2','email'=>'1233@123.com'),
            <span>array</span>('id'=>3,'name'=>'jack3','email'=>'12333@123.com'<span>)
            );
            </span><span>$data</span>['new_title']="标题"<span>;
            </span><span>$data</span>['list']=<span>$list</span><span>;
            </span><span>$this</span>->load->vars(<span>$data</span><span>);
            
            </span><span>$this</span>->load->view("view_test"<span>);
        }</span>

function

addView() {

<html>
    <head>
    </head>
    <body>
        <h1><?php <span>echo</span> <span>$title</span>;?></h1>
        <h1><?php <span>echo</span> <span>$new_title</span>;?></h1><span>
        test_ci_hello_world
        </span><table>
            <?php <span>foreach</span>(<span>$list</span> <span>as</span> <span>$item</span>):?>
            <tr>
                <td><?=<span>$item</span>['id']?></td>    
                <td><?=<span>$item</span>['name']?></td>
                <td><?=<span>$item</span>['email']?></td>                
            </tr>
            <?php <span>endforeach</span>;?>
        </table>
    </body>
</html>

$this

->load->vars("title","value"

); $list = array( array('id'=>1,'name'=>'jack','email'=>'123@123.com'), array('id'=>2,'name'=>'jack2','email'=>'1233@123.com'), array('id'=>3,'name'=>'jack3','email'=>'12333@123.com') ); $data['new_title']="title"; $data['list']=$list; $this->load->vars($data); $this->load->view("view_test"); $this->load->view("footer"); } View view_test: View footer: Display effect: uri parameter acquisition                                                               

Controller:

<html>
    <head>
    </head>
    <body>
        <h1><?php <span>echo</span> <span>$title</span>;?></h1>
        <h1><?php <span>echo</span> <span>$new_title</span>;?></h1><span>
        test_ci_hello_world
        </span><table>
            <?php <span>foreach</span>(<span>$list</span> <span>as</span> <span>$item</span>):?>
            <tr>
                <td><?=<span>$item</span>['id']?></td>    
                <td><?=<span>$item</span>['name']?></td>
                <td><?=<span>$item</span>['email']?></td>                
            </tr>
            <?php <span>endforeach</span>;?>
        </table>

Effect:

加载数据库                                                                                 

这个操作在MVC中是放到model中做的。

在\application\config\database.php中配置数据库参数，注意dbprefix和swap_pre这两个参数。在php中写的是前缀，会默认当作swap_pre，然后放到数据库中的时候会转成dbprefix,但是最好两个都弄成一样的。

还有$active_group，默认是default，如果要连接两个数据库，把default另外取名，然后在函数中写明参数就OK。

必须继承数据核心类CI_Model，同时重载父类中的构造方法。

<span>class</span> Model_name <span>extends</span><span> CI_Model
{
    </span><span>function</span><span> __construct()
    {
        parent</span>::<span>__construct();
    }
}</span>

在每次使用数据库的时候，都需要加载一次数据库：

<span>$this</span>->load->database();

为了方便，可以将数据库的加载设置成自动加载，在\application\config\autoload.php中。

<span>$autoload</span>['libraries'] = <span>array</span>('database');

对于数据库访问对象，装载到超级对象的属性中 $this->db

<span>$res</span> = <span>$this</span>->db->query(<span>$sql</span>);<span>//</span><span>返回对象</span>
<span>$res</span>->result();<span>//</span><span>返回数组，数组中是一个一个的对象</span>
<span>$res</span>->result_array();<span>//</span><span>返回二维数组，里面是关联数组</span>
<span>$res</span>->row();<span>//</span><span>返回第一条数据，直接是一个对象</span>

AR操作数据库                                                                              

在database.php文件中，将$active_recoed的值改为TRUE，这样就可以使用AR了。

<span>//</span><span>查询</span>
<span>public</span> <span>function</span><span> index()
{
    </span><span>$res</span> = <span>$this</span>->db->get('表名');<span>//</span><span>这里自动调用前缀</span>
    <span>foreach</span>(<span>$res</span>->result() <span>as</span> <span>$item</span><span>)
    {
        </span><span>echo</span> <span>$item</span>->name."<br />"<span>;
    }
}</span>

<span>//</span><span>插入</span>
<span>public</span> <span>function</span><span> index()
{
    </span><span>$data</span>=<span>array</span><span>(
        </span>'name'=>'lisi',
        'password'=><span>md5</span>('lisi'<span>)
    );
    </span><span>$bool</span> = <span>$this</span>->db->insert("表名",<span>$data</span><span>);
    </span><span>var_dump</span>(<span>$bool</span><span>);
}</span>

<span>//</span><span>更新</span>
<span>public</span> <span>function</span><span> index()
{
    </span><span>$data</span>=<span>array</span><span>(
        </span>'name'=>'wangwu',
        'password'=><span>md5</span>('wangwu'<span>)
    );

    </span><span>$bool</span> = <span>$this</span>->db->update('表名',<span>$data</span>,<span>array</span>('id'=>3<span>));
    </span><span>var_dump</span>(<span>$bool</span><span>);
}</span>

<span>//</span><span>删除</span>
<span>$bool</span> = <span>$this</span>->db->delete('表名',<span>array</span>('id'=>2<span>));
</span><span>var_dump</span>(<span>$bool</span>);

新手助PHP 程序 CI框架开发 进来看一眼吧

常规的方法是ul嵌套，即主菜单ul-li里嵌套子菜单ul,要用到两级循环
首先循环主菜单，要有固定的条件来判断出主菜单，比如主菜单的uid==0或者其它。。。

• 栏目名称
  if($news_item['uid'] == 0){ //判断并得到主菜单
  
  echo "
• ".$news_item['title'] . '
  ';
  foreach ($news as $child_item): //循环二次
  if($news_item['id'] == $child_item['uid']){ //判断并得到对应子菜单
  echo "
  • "."ss".$child_item['title']."";
    }
    endforeach;
    echo "";
    }
    
    endforeach; ?>
    
    
    当然这仅限于两级菜单，多级或无限极，可以使用函数递归
    function menu($uid=0){ //设置缺省从主菜单开始
    global $news;
    foreach ($news as $news_item):
    
    if($news_item['uid'] == $uid){
    
    echo "
  • ".$news_item['title'] . '
    ';
    menu($news_item['id']); //递归调用
    
    echo "";
    }
    
    endforeach;
    
    }
    ------ 调用方法 ------------------------------
    
    >
     

    CI框架想创建一个model类继承CI_Modle,我创建在app/core/MY_Model，直接报错了

    Doesn’t the class name of MY_Controller need to be the same?
    

    http://www.bkjia.com/PHPjc/836503.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/836503.htmlTechArticleci framework (1), ci framework (ci directory structure |----- system framework program directory |- ---- core The core program of the framework |-----CodeIgniter.php boot file|-----Common.php loads the base class library...