CodeIgniter学习笔记五：分页，文件上传，session，验证码

发布时间：2020-05-25 03:27:24 所属栏目：PHP 来源：互联网

导读：一、分页示例代码：//装载类文件$this - load - library(pagination);$controller = $this-router-fetch_class();$action = $this-router-fetch_method();//每页显示10条数据，共有101条数据$config[base_url] = site_url($controller/$action);$config[total

一、分页

示例代码：

-> load -> library('pagination'$controller = $this->router->fetch_class();
$action = $this->router->fetch_method();

//每页显示10条数据，共有101条数据
$config['base_url'] = site_url("$controller/$action");
$config['total_rows'] = 101;
$config['per_page'] = 10;
$config['first_link'] = "首页";
$config['prev_link'] = "上一页";
$config['next_link'] = "下一页";
$config['last_link'] = "最后一页";

//如果setment不是3需要设置，默认为3
$config['uri_segment'] = 3;

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

//偏移量
$offset = intval($this -> uri -> segment(3));

$sql = "SELECT * FROM TEST LIMIT $offset," . $config['per_page'];

$pager = $this -> pagination -> create_links();

$this -> load -> view('article/index',array('pager' => $pager,'sql' => $sql));

需要注意的是，如果配置了url中隐藏index.php，在site_url中生成的路径中默认还是有index.php，需要在application/config/config.php中改成如下配置：

['index_page'] = '';

即可。

二、文件上传

示例代码：

['upload_path'] = './uploads/'['allowed_types'] = "gif|png|jpg|jpeg"['max_size'] = 512['file_name'] = $this -> load -> library('upload',$config);
//pic为input type=file的name
$this -> upload ->do_upload('pic');

//上传文件信息
$uploadInfo = $this -> upload -> data();
var_dump($uploadInfo);
/
array (size=14)
'file_name' => string '55a61d04e96f4.jpg' (length=17)
'file_type' => string 'image/jpeg' (length=10)
'file_path' => string 'E:/wamp/www/citest/uploads/' (length=27)
'full_path' => string 'E:/wamp/www/citest/uploads/55a61d04e96f4.jpg' (length=44)
'raw_name' => string '55a61d04e96f4' (length=13)
'orig_name' => string '55a61d04e96f4.jpg' (length=17)
'client_name' => string 'hk.jpg' (length=6)
'file_ext' => string '.jpg' (length=4)
'file_size' => float 125.09
'is_image' => boolean true
'image_width' => int 675
'image_height' => int 900
'image_type' => string 'jpeg' (length=4)
'image_size_str' => string 'width="675" height="900"' (length=24)
/

即可。

三、session

1、开启

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

默认已经开启，用上面的代码加载session库。

2、写入

= 'id' => 3,'name' => 'jim' -> session -> set_userdata("user",);

-> session -> userdata('user')

注：建议在 application/config/config.php 中配置加密key:

['encryption_key'] = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

四、验证码

示例：

->load->helper('captcha' = 'Random word', 'img_path' => './captcha/','img_url' => base_url() . 'captcha/', './path/to/fonts/texb.ttf', 'img_width' => '200','img_height' => 80,'expiration' => 60,'word_length' => 10,'font_size' => 26,'img_id' => 'Imageid','pool' => '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', 'colors' => 'background' => (255,255,255),'border' => (255,'text' => (0,0),'grid' => (255,40,40$cap = create_captcha($vals);
var_dump($cap);
/
array (size=4)
'word' => string 'hFan3NM4xB' (length=10)
'time' => float 1436954914.3053
'image' => string '' (length=129)
'filename' => string '1436954914.3053.jpg' (length=19)
/
echo $cap['image'];

注意：需要手动创建存放验证码的文件夹，验证码图片会在超时后自动删除。

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