应用代码规范

[TOC]

#### 继承app类

```
//admin/index.class.php
defined('IN_MET') or exit('No permission');
load::sys_class('app');

class index extends app {
    public function __construct() {
        global $_M;
        parent::__construct();
    }

public function doindex() {
        global $_M;
        $this->show('app/index');
    }
}
```

#### 应用后台加载模板使用show方法
```
public function doindex() {
    global $_M;
    $this->show('app/index');
}
```

#### 查询单条记录
```
$this->table('applist')->where("no = 10043")->find();
```

#### 查询多条记录
```
$this->table('applist')->where("no = 10043")->get();
```

#### 查询指定字段
```
$this->table('applist')->where("no = 10043")->get('no,appname');
```
#### 限制查询条数
```
$this->table('applist')->limit(10)->get();
$this->table('applist')->limit(0,10)->get();

```

#### 插入数据
```
$data = array();
$data['no'] = 10043;
$data['appname']='商城模块';
$this->table('applist')->insert($data);
```

#### 更新数据
```
$data = array();
$data['appname'] = '商城模块4.0';
$this->table('applist')->where('no = 10043')->update($data);
```
#### 删除数据
```
$this->table('applist')->where('no = 10043')->delete();
```