Reference
- https://github.com/bcit-ci/CodeIgniter/wiki/Using-MongoDB-in-Codeigniter
- http://intekhab.in/mongodb-library-for-codeigniter.html 使用文档
- http://tekina.info/how-to-use-mongodb-in-codeigniter/ 安装教程 附油管视频
- 油管视频：https://youtu.be/SMDznjUz57c 结尾附常用使用方法
安装PECL
PECL is a repository for PHP Extensions, providing a directory of all known extensions and hosting facilities for downloading and development of PHP extensions.The packaging and distribution system used by PECL is shared with its sister, PEAR.
http://www.runoob.com/mongodb/mongodb-install-php-driver.html
下载扩展
https://pecl.php.net/package/mongodb 找到对应的版本 - 对应的是否线程安全（nts vs ts）
放入目录
下载完你需要的二进制包后，解压压缩包，将 php_mongodb.dll文件添加到你的PHP扩展目录中（ext）。ext目录通常在PHP安装目录下的ext目录。
打开php配置文件 php.ini 添加以下配置：
extension=php_mongodb.dll
重启服务器。
这样就安装完成了扩展。
下载codeigniter-mongodb-library
用git clone下载后目录结构为
codeigniter-mongodb-library
├── application
│ ├── config
│ │ └── mongo_db.php
│ └── libraries
│ └── Mongo_db.php
├── LICENSE
└── README.md
3 directories, 4 files
添加文件
config
然后将config\mongo_db.php放到Codeigniter框架application的conf目录下，并配置对应的选项。
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/*
| -------------------------------------------------------------------------
| DATABASE CONNECTIVITY SETTINGS
| -------------------------------------------------------------------------
| This file will contain the settings needed to access your Mongo database.
|
|
| ------------------------------------------------------------------------
| EXPLANATION OF VARIABLES
| ------------------------------------------------------------------------
|
| ['hostname'] The hostname of your database server.
| ['username'] The username used to connect to the database
| ['password'] The password used to connect to the database
| ['database'] The name of the database you want to connect to
| ['db_debug'] TRUE/FALSE - Whether database errors should be displayed.
| ['write_concerns'] Default is 1: acknowledge write operations. ref(http://php.net/manual/en/mongo.writeconcerns.php)
| ['journal'] Default is TRUE : journal flushed to disk. ref(http://php.net/manual/en/mongo.writeconcerns.php)
| ['read_preference'] Set the read preference for this connection. ref (http://php.net/manual/en/mongoclient.setreadpreference.php)
| ['read_preference_tags'] Set the read preference for this connection. ref (http://php.net/manual/en/mongoclient.setreadpreference.php)
|
| The $config['mongo_db']['active'] variable lets you choose which connection group to
| make active. By default there is only one group (the 'default' group).
|
*/
$config['mongo_db']['active'] = 'default';
$config['mongo_db']['default']['no_auth'] = true;
$config['mongo_db']['default']['hostname'] = 'localhost';
$config['mongo_db']['default']['port'] = '27017';
$config['mongo_db']['default']['username'] = '';
$config['mongo_db']['default']['password'] = '';
$config['mongo_db']['default']['database'] = 'ci_test'; // 测试数据库ci_test
$config['mongo_db']['default']['db_debug'] = TRUE;
$config['mongo_db']['default']['return_as'] = 'array';
$config['mongo_db']['default']['write_concerns'] = (int)1;
$config['mongo_db']['default']['journal'] = TRUE;
$config['mongo_db']['default']['read_preference'] = 'primary';
$config['mongo_db']['default']['read_concern'] = 'local'; //'local', 'majority' or 'linearizable'
$config['mongo_db']['default']['legacy_support'] = TRUE;
/* End of file database.php */
/* Location: ./application/config/database.php */
可以修改 mongo_db下面的键名 default ，但是我这里保持默认。
修改autoload.php
将mongo_db加入到$autoload['libraries']的array中。
libraries
将 下载文件夹中的 libraries\Mongo_db.php 放到对应框架的application中去application/libraries/Mongo_db.php
使用
在controller的方法中这样使用
public function index()
{
$this->load->library('mongo_db',array('activate'=>'default'),'mongo_db');
$res = $this->mongo_db->get('test');
echo 'codeigniter + MongoDB';
echo '<pre>';
print_r($res);
}
具体的使用方法可以看手册：https://github.com/intekhabrizvi/codeigniter-mongodb-library
更好的是直接看 lib 中的源码！注释里面都有usage
get
@usage : $this->mongo_db->get('foo');
get($collection = "")
选择查看的 集合名称 string类型，返回该集合所有内容（所有字段）
get_where
@usage : $this->mongo_db->get_where('foo', array('bar' => 'something'));
get_where($collection = "", $where = array())
- 参数一：集合名称 字符串
- 参数二：条件 array数组
就是和find命令一样，返回符合where这个条件的内容。
select
@usage: $this->mongo_db->select(array('foo', 'bar'))->get('foobar');
select($includes = array(), $excludes = array())
select第一个参数是包括的字段，第二个是除外的字段，然后再调用get，就可以只显示固定的字段了。（但是好像_id都会返回）
find_one
@usage : $this->mongo_db->find_one('foo');
find_one($collection = "")
只返回集合中的一个文件
where
@usage : $this->mongo_db->where(array('foo' => 'bar'))->get('foobar');
where($wheres, $value = null)
这个$wheres就是一个 键名 - 键值 和 列名 - 查找值 对应的关系
update
@usage: $this->mongo_db->update('foo', $data = array());
update($collection = "", $options = array())
一般和where和set连用吧。where找到具体记录 set后update更新
- 参数1：集合名 string
- 参数2：选项
set
@usage: $this->mongo_db->where(array('blog_id'=>123))->set('posted', 1)->update('blog_posts');
@usage: $this->mongo_db->where(array('blog_id'=>123))->set(array('posted' => 1, 'time' => time()))->update('blog_posts');
set($fields, $value = NULL)
这个set用来设置具体字段的内容的，如usage上的写法，可以先调用where在用set然后显式的update
delete
@usage : $this->mongo_db->delete('foo');
delete($collection = "")
应该也是做最后的一个显式提交，先用where或者其他方式找到某个文件，然后delete下。
