优化2

app/Models/ParkingLicensePlate.php

@@ -5,7 +5,6 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
-use Illuminate\Support\Collection;
 
 class ParkingLicensePlate extends Model
 {
@@ -29,7 +28,7 @@ class ParkingLicensePlate extends Model
         return self::query()->where('id', $id)->value('number') ?? '';
     }
 
-    public static function getId($number): array|Collection
+    public static function getId($number)
     {
         return self::query()->where('number', 'like', "%{$number}%")->pluck(
             'id'