Analysis of commonly used operation classes in CI framework
这篇文章主要介绍了CI框架常用经典操作类,结合实例形式总结分析了CI框架URL、路由、伪静态、分页、session、验证码等相关操作类与使用技巧,需要的朋友可以参考下
本文实例总结了CI框架常用经典操作类。分享给大家供大家参考,具体如下:
1. 超级对象中的URI
CI_URI类的解析url的相关信息
直接使用$this->uri可以使用它的相关属性
system/core/URI.php文件中
部分常用属性:
(1) 分段获取url相关信息
$this->uri->segment(4); //获取url中pathinfo //的第四段的值
入口文件.php/控制器/动作/参数1/参数2/...
(2) 通过方法中的形参传参
需要设默认值和顺序要注意
index.php/user/index/3/zhangsan
public function index($id=0,$name=''){ echo $id,$name; }
2.CI控制器的扩展
在application/core/文件夹下面
添加自己的扩展控制器
class MY_Controller extends CI_Controller{ public function __construct(){ parent::__construct } }
配置模型前缀
$config['subclass_prefix']='MY_';//默认值
3.模型的相关操作
文件名全小写,类名首字母大写
建议类名加上 _model后缀
在控制器中加载模型:
在construct中加入:
$this->load->model('User_model'); $this->User_model->get();
为模型起别名
$this->load->model('User_model','user'); $this->user->get();
4.url中的常用函数
(1)帮助我们生成控制器
$this->load->helper('url'); site_url('控制器/方法');
(2)图片路径的使用
$this->load->helper('url');
<img src="<?php echo base_url();?>upload/a.jpg" />
可以在autoload.php中配置自动加载
$autoload['helper']加入url
5. CI中的路由与伪静态
(1) 路由伪静态
$router['show/([\d]+)\.html']='article/show/$1'; article/show/5.html => article/show/5;
(2) 隐藏入口文件
#开启apache的rewrite模块 #在根目录中放入.htaccess文件进行重写 RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ index.php/$1 [QSA,PT,L]
6. CI中的分页
//模型中操作 //装载分页类文件 $this->load->library('pagination'); $this->load->helper(url); //分页链接 $config['base_url'] = site_url('user/test'); //总记录条数 $config['total_rows'] = 100; //每页显示10条数据 $config['per_page'] = 10; //偏移量 $offset_limit = intval($this->uri->segment(3)); $this->pagination->initialize($config); echo $this->pagination->create_links();
分页中按钮的定制(注意在初始化之前配置好)
$config['first_link'] = '首页'; ... $config['uri_segment'] =3;//分页数据查询偏移量
在url的哪一段上,对应上面的$offset
默认是3,否则需要修改对应值
7. CI 中session的使用
//加载session库 $this->load->library('session');
(1)获取系统session
//比如获取客户端的ip地址 $this->session->userdata('ip_address');
(2) 添加自定义session
//添加 $this->session->set_userdata('some_name', 'some_value'); //获取 $this->session->userdata('some_name'); //删除 $this->session->unset_userdata('some_name');
(3)闪出数据 (取出一次后失效)
//添加 $this->session->set_flashdata('item', 'value'); //获取 $this->session->flashdata('item');
登录数据中 返回登录前的那一个页面的url可以记录下来,
注意:一次性的数据,读取一次后会自动销毁。
为了确保安全,在config.php生成随机加密的字符串中加入
$config['encryption_key']="fjkdsffjkhjd#kjh";
是否要将cookie加密
$config['sess_encrypt_cookie'] =TRUE;
8. CI中的文件上传
<form action="<?php echo site_url('user/upload');?>" enctype="multipart/form-data"> <input type="file" name="pic"/> <input type="submit" value="submit"> </form>
上传处理:
$config['upload_path']="./upload"; $config['allowed_types']='gif|jpeg|jpg'; $this->load->library('upload',$config); $this->upload->do_upload('pic');
文件上传的数据
$filedata = $this->upload->data();
9. CI中的验证码
//生成验证码 $this->load->helper('captcha'); $this->load->helper('url'); $vals = array( 'word'=>rand(1000,9999), 'img_path'=>'./captcha/', 'img_url'=>base_url().'/captcha/' 'img_width'=>'150', 'img_height'=>'100', 'expiration'=>7200 ); $cap = create_captcha($vals); echo $cap['image']; //将验证码获取的数字放在session中 session_start(); $_SESSION['cap'] = $cap['word'];
以上就是本文的全部内容,希望对大家的学习有所帮助,更多相关内容请关注PHP中文网!
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