yii2学习整理
（1）use yii\bootstrap\ActiveForm; 请求form表单
<?php $form = ActiveForm::begin(['id' => '', 'action' => "提交地址" . $model->id]); ?>
<?= $form->field($order, '已实例化的字段', [
'inputOptions' => ['class' => '', 'placeholder' => '', 'tabindex' => ''],
'template' => '<div class="">{input}</div>
<div class="">{error}</div>
'])->textInput();
radioList(['0' => '冻结', '1' => '正常']);
textarea();?><?php ActiveForm::end(); ?>
（2）use yii\data\Pagination;请求分页
$pages = new Pagination(['totalCount' => $data->count(), 'pageSize' => '20']);
$model = $data->offset($pages->offset)
->limit($pages->limit)
->orderBy('id asc')
->asArray()->all();
<?= LinkPager::widget(['pagination' => $pages]); ?>
（3）foreach循环
<?php foreach ($model as $val) { ?>
<?php } ?>
<?php foreach ($power as $key => $val) { ?>
<?php } ?>
（4）$this->render(,['']) 渲染页面 $this->redirect(['']); 重定向
（5）实例化对象
$model = Models::find();
$model = Models::findOne(' '=>' ',' '=>' ');
$model = $id ? Models::findOne($id) : new Models();
（6）类的公用函数指定布局
public $layout = 'view';
（7）查询条件
where([' '=>' ',' '=>' '])查询条件select(' ')查询字段asArray( )查询结果作为数组
（8）控制器接收数据
$model->load(Yii::$app->request->post()) && $model->validate() $params = Yii::$app->request->post(); $params = Yii::$app->request->get();
（9）函数
$newfield = explode(',', $abc); 把字符串按照参数分割为数组
number_format(number,decimals,decimalpoint,separator) 函数通过千位分组来格式化数字。
bcadd()
bcsub()
（10）ajax传参数json
use yii\web\Response;public function init() init初始化的成员函数使用
{parent::init();if (Yii::$app->request->isAjax)
Yii::$app->response->format = Response::FORMAT_JSON;
}return ['msg'=>'提示信息'];
（11）保存数据
$_model->save();
（12）引入文件
$this->registerCssFile('相对地址', ['depends' => 'yii\web\YiiAsset', 'position' => 1]);
$this->registerJsFile('相对地址', ['depends' => 'yii\web\YiiAsset', 'position' => 1]);
（13）用户是否登录
if (\Yii::$app->user->isGuest) {return $this->redirect('/');
}
$id = Yii::$app->user->getIdentity()->id; 获取当前用户的id
（14）联查
$record = 表一::find()->innerJoin( 表二, $order_table . ".online_pid=" . $product_table . ".id") ->select( $order_table . ".*," . $product_table . ".title as abc,"" . $product_table . '.money,' . $product_table . '.yield_rate,' . $product_table . '.refund_method,' . $product_table . '.expires,' . $product_table . '.start_date,' . $product_table . '.end_date') $sql = $record->createCommand()->getRawSql(); $model = $db->createCommand($sql)->queryAll();
（15）报错
$model->addError('字段', '提示');
（16）事物
$transaction = Yii::$app->db->beginTransaction(); $transaction->commit();$transaction->rollBack();
(17)隐藏域
<?= $form->field($omodel, 'order_money', ['template' => '{input}'])->hiddenInput() ?>
<input type="hidden" value="<?= $omodel->order_money ?>" name="order_money"/>
<?= $form->field($omodel, 'order_money', ['template' => '{error}']) ?>