更新

console/controllers/TestController.php

@@ -56,7 +56,7 @@ class TestController extends Controller
         $query = new \yii\db\Query();
         $query->select(['id', 'sendStatus']);
         $query->from(Purchase::tableName());
-        foreach ($query->batch(30) as $batch) {
+        foreach ($query->batch() as $batch) {
             print_r($batch);die;
             foreach ($batch as $order) {
                 $id = $order['id'];