yii2使用随记

1.时间范围判断

$machines = Machine::find()

->select('id,name')

->andFilterWhere(['between', 'timestamp', $start_date, $end_date])

->asArray()

->all();

2.时间戳与日期转换

$timestamp = strtotime($datetime);

$datetime = date('Y-m-d H:i:s', $timestamp);

3.使用sql语句

$db = Yii::$app->db;

$sql = '...';

$result = $db->createCommand($sql)->bindValues(array(

':driver_id' => $driver->id,...

))->queryOne();

4.分页

（1）nextpage由服务端返回第几页

if (!isset($nextpage) || empty($nextpage)) {

$nextpage = 0;

}

if ($nextpage < 0) {

return;

}

$page = 5;

$machines = Machine::find()

->offset($nextpage * $page)

->limit($page)

->all();

$total_count = ...

if (本次查询个数 + $nextpage * $page < $total_count) {

echo json_encode($this->success(array('machines' => $result, 'nextpage' => $nextpage + 1)));

} else {

echo json_encode($this->success(array('machines' => $result, 'nextpage' => '')));

}

（2）nextpage由服务端返回自定义时间戳，用于订单按日期排序并统计

5.排序

->orderBy(['farmer_comment_timestamp' => SORT_DESC])

6.isset，empty，is_null验证数据

7.输入的数据校验

8.不能为空判断

->andWhere('farmer_comment != :farmer_comment', [':farmer_comment' => ''])

9.图片url

$url = Yii::$app->urlManager->getHostInfo() . Yii::$app->urlManager->getBaseUrl() . '/' . $farmer['avatar'];

10.参数判断

if (!isset($farmer_id) || empty($farmer_id)) {

echo json_encode($this->fail('', 0, '农民编号不能为空'));

return;

}

11.编码

header("Content-type:json/application;charset=utf-8");

12.字符串截取

$region_id1 = substr($region_id, 0, 2);

13.数字截取

$region_id1 * pow(10, 10)

14.字段求和

$machine_order->getField()->sum('client_area');

15.调用存储过程

$temp = Yii::$app->db->createCommand('call region_count_proc(:machine_order_id,:driver_id)')

->bindValues([':machine_order_id' => $machine_order_id, ':driver_id' => $machine_order->driver_id])

->queryOne();

16.时间范围判断

$dates = Schedule::find()

->select(['date', 'status'])

->where(['machine_id' => $machine_id])

->andWhere('date >= :start_date', [':start_date' => $start_date])

->andWhere('date <= :end_date', [':end_date' => $end_date])

->orderBy('date')

->all();

17.多表查询后条件

$works = $machine

->getWorks()

->select('id,farmer_id,farmer_comment,farmer_star,farmer_comment_timestamp')

->where(['status' => Work::STATUS_FINISH])

->andWhere('farmer_comment != :farmer_comment', [':farmer_comment' => ''])

->offset(0)

->limit(2)

->orderBy(['farmer_comment_timestamp' => SORT_DESC])

->asArray()

->all();

18.根据两点间的经纬度计算距离

/**

     * @desc 根据两点间的经纬度计算距离

     * @param float $lat 纬度值

     * @param float $lng 经度值

     */

    function getDistance($lat1, $lng1, $lat2, $lng2)

    {

        $earthRadius = 6367000; //approximate radius of earth in meters

        /*

        Convert these degrees to radians

        to work with the formula

        */

        $lat1 = ($lat1 * pi()) / 180;

        $lng1 = ($lng1 * pi()) / 180;

        $lat2 = ($lat2 * pi()) / 180;

        $lng2 = ($lng2 * pi()) / 180;

        /*

        Using the

        Haversine formula

        http://en.wikipedia.org/wiki/Haversine_formula
        calculate the distance

        */

        $calcLongitude = $lng2 - $lng1;

        $calcLatitude = $lat2 - $lat1;

        $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);

        $stepTwo = 2 * asin(min(1, sqrt($stepOne)));

        $calculatedDistance = $earthRadius * $stepTwo;

        return round($calculatedDistance);

    }

19.默认路由 

'defaultRoute' => 'admin'

20.默认动作

public $defaultAction = 'index'

21.百度推送 

本地使用php5.6没问题，服务端使用php5.4报错SDK params invalid, check the param

跟踪源代码发现问题。

php5.4中pushMsgToSingleDevice($channel_id , $message, $opts);channel_id必须是字符串

调用第三方包的时候php中注意数据类型

22.通过model向数据库中保存数据时，注意数据类型，因为model的属性都是有类型，类型不对数据不能保存成功

$field->obstacle_type = strval($obstacle_type_ids);

23.implode，explode第二个参数是字符串不能为数字

24.array转string

implode(array,'字符串分割符')

25.string转array

explode('字符串分割符',string)