Codeigniter 类库参考

购物车类：

$this->cart->insert();   //添加到购物车中

$this->cart->update();  //更新购物车中的项目

$this->cart->total(); //显示购物车的总计金额

$this->cart->total_items();  //显示购物车中总共的项目数量

$this->cart->contents();  //购物车中所有信息数组

$this->cart->has_options(rowid);  //如果购物车中特定的包含选项信息，返回布尔值

$this->cart->product_options(rowid);  //以数组的形式返回特定商品选项信息

***********************demo***************************

<?php $i=1; ?>

<?php foreach ($this->cart->contents() as $items):?>

<?php echo form_hidden($i.'[rowid]',$items['rowid']);?>

<?php if ($this->cart->has_options($items['rowid']) == TRUE):?>

<?php foreach ($this->cart->product_options($items['rowid']) as $option_name => $option_value):?>

<?php echo $option_name;?> : <?php echo $option_value;?>

<?php endforeach;?>

<?php endif;?>

<?php echo $this->cart->format_number($items['price']);?>

<?php echo $this->cart->format_number($items['subtotal']);?>

<?php $i++;?>

<?php endif;?>

<?php echo $this->cart->format_number($this->cart->total());?>

***********************demo end***************************

配置类：

主要配置文件： application/config/config.php

加载配置文件：系统会默认加载系统的配置文件，可手动建立自己的配置文件并手动加载。

$this->config->load('filename自定义配置文件名');  //手动加载

//第二个参数设置为ture，使每个配置文件的内容都存储在一个单独数组中

$this->config->load('filename',TRUE);    // $this->config['filename']=$config

获取配置元素

$this->config->item('item name');

***********************demo*******************

$this->config->load('filename',TRUE);

$site_name=$this->config->item('site_name','filename');

OR

$filename=$this->config->item('filename');

$site_name=$filename['site_name'];

设置一项元素

$this->config->set_item('item_name','item_value');

辅助函数

$this->config->site_url();   //网站的URL

$this->config->system_url();

加密类

application/config/config.php

$config['encryption_key']='';

初始化：$this->load->library('encrypt');

执行数据加密：$this->encrypt->encode();

执行数据解密：$this->encrypt->decode();

文件上传类

需要表单属性 multipart

加载：$this->load->library('upload');

参数配置：

$config['upload_path']='./uploads';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size']='100';
$config['max_width']='1024';
$config['max_height']='768';
$this->load->library('upload',$config);
//  $this->upload->initialize($config);

$this->upload->do_upload('文件域名称');

$this->upload->display_errors();

$this->upload->data();

表单验证类

加载：$this->load->library('form_validation');

// trim 去掉字符两端的空白
// required 必填项
// min_length[5] 最少字符数
// max_length[12] 最长字符数
// matches['password'] 匹配两次输入的密码
// md5  加密
// xss_clean 将用户名通过这个函数处理有害数据

$this->form_validateion->set_rules('username','USERNAME','trim|required|min_length[5]|max_length[12]|matches['password2']|MD5|xss_clean');

if($this->form_validation->run() == FALSE)
{
........

 }else{
.......
}

图像处理类(调整大小，图像裁剪，图像旋转，添加水印)

载入：$this->load->library('image_lib');

基本参数设置：
$config['image_library']='gd2';
$config['source_image']='/path/to/image/mypic.jpg';
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width'] = '75';
$config['height'] = '50';

$this->load->library('image_lib',$config);

$this->image_lib->resize();

创建一个备份和创建一个缩略图：

$this->image_lib->resize();  //创建图片并保留原图

$config['create_thumb'] = TRUE;  //创建一个缩略图
$config['new_image'] = '/path/to/new_image.jpg'; //新图片存放路径

裁剪一张图片：$this->image-Lib->crop();

$config['image_library'] = "imagemagick";
$config['library_path'] ='/usr/x11R6/bin/';
$config['x_axis'] = '100';
$config['y_axis'] = '60';
$this->image_lib->initialize($config);
if( ! $this->image_lib->crop())
{
  echo $this->image_lib->display_errors();
}

旋转图片：$this->image_lib->rotate();
$config['image_library'] = 'netpbm';
$config['library_path'] = '/usr/bin';
$config['source_image'] = '/path/to/image/mypic.jpg';
$config['rotation_angle'] = 'hor';   // hor--水平翻转  vrt--垂直翻转  90--逆时针旋转90
$this->image_lib->initialize($config);
if (! $this->image_lib->rotate())
{
  echo $this->image_lib->display_errors();
}

水印图片：$this->image_lib->watermark();

$config['source_image'] = '/path/to/image/mypic.jpg';
$config['wm_text'] = '水印文字';
$config['wm_type'] = 'text';
$config['wm_font_path'] = './systme/fonts/texb.ttf';
$config['wm_font_color'] = 'ffffff';
$config['wm_vrt_alignment'] = 'bottom';
$config['wm_hor_alignment'] = 'center';
$config['wm_padding'] = '20';

$this->image_lib->initialize($config);

$this->image_lib->watermark();

输入类

$this->input->post();

$this->input->get();

$this->input->get_post();

$this->input->server();

$this->input->cookie();

$this->input->set_cookie();

装载类：

$this->load->library();

$this->load->view();

$this->load->model();

$this->load->database();

$this->load->vars($array);

$this->load->helper();

$this->load->file();

$this->load->language();

$this->load->config();

输出类

用给定的数据作为输出，比如数据导出EXCEL格式，放在最后一行代码
$this->output->set_output($data);

输出的数据保存起来，比如网站静态页
$string = $this->output->get_output();

设置HTTP协议头
$this->output->set_header();

分页类

$this->load->library('pagination');

$config['base_url'] = 'http://example.com/index.php/test/page/';

$config['total_rows'] = '200';   // 总记录

$config['per_page'] = '20';

$config['num_links'] ='2';

$this->pagination->initialize($config);

echo $this->pagination->create_links();

SESSION 类  system/config/config.php  $config['sess_time_to_update']

$this->load->library('session');

$this->session->set_userdata($array);

$item = $this->session->userdata('item');

删除session数据

$this->session->unset_userdata('item');

$this->session->unset_userdata($array);

销毁Session

$this->session->sess_destory();

URI 类

$this->uri->segment();

$this->uri->segment(3,0);  // 第二个参数设置默认值

$this->uri->uri_to_assoc();  //URL路径转换为数组形式

$this->uri->assoc_to_uri($array); //数组形式转换为URL路径

$this->uri->uri_string(); // 返回URL后半段地址

User-Agent 类

$this->load->library('user_agent');

$this->agent->is_browser('safari');  //浏览器

$this->agent->is_mobile('iphone');  //客户端

$this->agent->is_robot();  //机器人

$this->agent->version();   //版本

ZIP 编码类

$this->load->library('zip');

$this->zip->add_data($name,$array);

$this->zip->read_file($path,TRUE);  //压缩某个文件

$this->zip->read_dir($path); //压缩某个文件夹

$this->zip->archive(); //把压缩文件写入服务器的某目录下

$this->zip->download(); //从服务器上下载一个zip文件