如何在laravel 5.2中将多选下拉数据插入数据库

In my form i created multiselect drop down list. i need to store the data which i selected from my multi select drop down to database, table name devicelist along with some value that is taken from my form. my view page is

  @extends('app')

@section('content')
    <br><br><br><br><br>
    <div class="templatemo-content-wrapper">
        <div class="container">
            <ol class="breadcrumb">
                <li><a href="{{ url("/") }}"><font color="green">Home</font></a></li>
                <li class="active">View/Edit Vehicle</li>
            </ol>
            <div class="row">
                <div class="col-md-8 col-md-offset-2">
                    <div class="panel panel-success">
                        <div class="panel-heading">View/Edit Vehicle Information</div>
                        <div class="panel-body">
                            @if (count($errors) > 0)
                                <div class="alert alert-danger">
                                    <strong>Whoops!</strong> There were some problems with your input.<br><br>
                                    <ul>
                                        @foreach ($errors->all() as $error)
                                            <li>{{ $error }}</li>
                                        @endforeach
                                    </ul>
                                </div>
                            @endif

                            <form class="form-horizontal" role="form" method="POST" action="{{ url('vehicle/update/') }}">
                                <input type="hidden" name="_token" value="{{ csrf_token() }}">
@foreach($devices as $device)
                                <div class="form-group">
                                    <label class="col-md-4 control-label">Vehicle ID</label>
                                    <div class="col-md-6">

                                        <input type="text" class="form-control" name="deviceID" value="{{ ($device->deviceID)}}">

                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Creation date</label>
                                    <div class="col-md-6">

                                        <input type="text" class="form-control" name="creationTime" value="{{ date('Y/m/d H:i:s',($device->creationTime))}}">

                                    </div>
                                </div>

                                <!--<div class="form-group">
                                    <label class="col-md-4 control-label">Server ID</label>
                                    <div class="col-md-6">

                                        <input type="text" class="form-control" name="userID" value="" placeholder="Enter User ID">

                                    </div>
                                </div>  -->

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Unique ID</label>
                                    <div class="col-md-6">

                                        <input type="text" class="form-control" name="uniqueID" value="{{ ($device->uniqueID)}}" placeholder="Enter Unique ID">

                                    </div>
                                </div>


                                <div class="form-group">
                                    <label class="col-md-4 control-label">Active</label>
                                    <div class="col-md-6">
                                        <select class="form-control" value="{{ ($device->isActive) }}" name="isActive" >
                                            <option value="1">Yes</option>
                                            <option value="0">No</option>
                                        </select>
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Vehicle Description</label>
                                    <div class="col-md-6">
                                        <input type="text" class="form-control" name="description" value="{{ ($device->description) }}" placeholder="Enter the description">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Short Name</label>
                                    <div class="col-md-6">
                                        <input type="text" class="form-control" name="displayName" value="{{ ($device->displayName) }}" placeholder="Enter Display Name">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Vehicle ID</label>
                                    <div class="col-md-6">
                                        <input type="text" class="form-control" name="vehicleID" value="{{ ($device->vehicleID) }}" placeholder="Enter Vehicle ID">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">License Plate</label>
                                    <div class="col-md-6">
                                        <input type="text" class="form-control" name="licensePlate" value="{{ ($device->licensePlate) }}" placeholder="Enter license Plate">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">License Expiration</label>
                                    <div class="col-md-6">
                                        <input type="date" class="form-control" name="licenseExpire" value="{{ ($device->licenseExpire) }}" placeholder="Enter license Expire Date">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Equipment Type</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="equipmentType" value="{{ ($device->equipmentType) }}" placeholder="Enter E-Mail Address">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Equipment Status</label>
                                    <div class="col-md-6">
                                        <select class="form-control" value="{{ ($device->equipmentStatus) }}" name="equipmentStatus" >
                                            <option>Unspecified</option>
                                            <option value="inservice">In Service</option>
                                            <option value="rented">Rented</option>
                                            <option value="pending">Pending</option>
                                            <option value="completed">Completed</option>
                                            <option value="available">Available</option>
                                            <option value="unavailable">Unavailable</option>
                                            <option value="repair">Repair</option>
                                            <option value="retired">Retired</option>

                                        </select>
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">IMEI/EDN Number</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="imeiNumber" value="{{ ($device->imeiNumber) }}" placeholder="Enter IMEI/EDN Number">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Serial Number</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="serialNumber" value="{{ ($device->serialNumber) }}" placeholder="Enter Serial Number">
                                    </div>
                                </div>

                            <!--    <div class="form-group">
                                    <label class="col-md-4 control-label">Data Key</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="notifyEmail" value="" placeholder="Enter E-Mail Address">
                                    </div>
                                </div>  -->

                                <div class="form-group">
                                    <label class="col-md-4 control-label">SIM Phone</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="simPhoneNumber" value="{{ ($device->simPhoneNumber) }}" placeholder="Enter SIM Phone Number">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">SMS Email Address</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="smsEmail" value="{{ ($device->smsEmail) }}" placeholder="Enter SMS E-Mail Address">
                                    </div>
                                </div>

                            <!--    <div class="form-group">
                                    <label class="col-md-4 control-label">Group Pushpin ID</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="notifyEmail" value="" placeholder="Enter E-Mail Address">
                                    </div>
                                </div>  -->

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Map Route Color</label>
                                    <div class="col-md-6">
                                        <select class="form-control" value="{{ ($device->displayColor) }}" name="displayColor" >
                                            <option>Default</option>
                                            <option value="#000000">Black</option>
                                            <option value="#a52a2a">Brown</option>
                                            <option value="#dd0000">Red</option>
                                            <option value="#b37400">Orange</option>
                                            <option value="#008f00">Green</option>
                                            <option value="#0000ee">Blue</option>
                                            <option value="#9400d3">Purple</option>
                                            <option value="#505050">Grey</option>
                                            <option value="#00b3b3">Cyan</option>
                                            <option value="#ff1493">Pink</option>
                                            <option value="none">None</option>
                                        </select>
                                    </div>
                                </div>




                                <div class="form-group">
                                    <label class="col-md-4 control-label">Fuel Capacity</label>
                                    <div class="col-md-6">
                                        <input type="text" class="form-control" name="fuelCapacity" value="{{ ($device->fuelCapacity) }}" >
                                    </div>
                                </div>


                                <div class="form-group">
                                    <label class="col-md-4 control-label">Driver ID</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="driverID" value="{{ ($device->driverID) }}">
                                    </div>
                                </div>

                         <!--       <div class="form-group">
                                    <label class="col-md-4 control-label">Reported Odometer</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="notifyEmail" value="" placeholder="Enter E-Mail Address">
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label class="col-md-4 control-label">Reported Engine Hours</label>
                                    <div class="col-md-6">
                                        <input type="email" class="form-control" name="notifyEmail" value="" placeholder="Enter E-Mail Address">
                                    </div>
                                </div>  -->

                                    <div class="form-group">

                                            <label class="col-md-4 control-label">Group Membership</label>
                                            <div class="col-md-6">
                                            {{--<select class="form-control" value="{{ old('groupID') }}" name="groupID" multiple >--}}
                                                {{--@foreach( $grouplist as $group)--}}
                                                    {{--@if ($group->groupID == old('description'))--}}
                                                        {{--<option value="{{ $group->groupID }}" >{{ $group->groupID." ".'['.$group->description.']' }}</option>--}}
                                                    {{--@else--}}
                                                        {{--<option value="{{ $group->groupID }}" >{{ $group->groupID." ".'['.$group->description.']' }}</option>--}}
                                                    {{--@endif--}}
                                                {{--@endforeach--}}
                                            {{--</select>--}}

                                                <script type="text/javascript">
                                                    $(".js-example-basic-multiple").select2();
                                                </script>

                                                <select class="js-example-basic-multiple js-states form-control" id="id_label_multiple" value="{{ old('groupID[]') }}" name="groupID" multiple="multiple" >
                                                    @foreach( $grouplist as $group)
                                                        @if ($group->groupID == old('description'))
                                                            <option value="{{ $group->groupID }}" >{{ $group->groupID." ".'['.$group->description.']' }}</option>
                                                        @else
                                                            <option value="{{ $group->groupID }}" >{{ $group->groupID." ".'['.$group->description.']' }}</option>
                                                        @endif
                                                    @endforeach
                                                </select>





                                            </div>
                                        </div>




                                <div class="form-group">
                                    <div class="col-md-6 col-md-offset-4">
                                        <button type="submit" class="btn btn-warning">
                                            Update
                                        </button>
                                    </div>
                                </div>
@endforeach
                            </form>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
@endsection

and my controller page is

 public function update(Request $request)
{
    try {

        $postUser = Input::all();
        //insert data into mysql table
        $account = Account::select('accountID')->where('accountID', '=', 'gts')->get();


        foreach ($account as $acc) {
            $abc = $acc->accountID;
        }

        $data=DB::table('device')
            ->where("deviceID",$request['deviceID'])
            ->update(array(
                "uniqueID"=>$request['uniqueID'],
                "isActive"=>$request['isActive'],
                "description"=>$request['description'],
                "displayName"=>$request['displayName'],
                "vehicleID"=>$request['vehicleID'],
                "licensePlate"=>$request['licensePlate'],
                "licenseExpire"=>$request['licenseExpire'],
                "equipmentType"=>$request['equipmentType'],
                "equipmentStatus"=>$request['equipmentStatus'],
                "imeiNumber"=>$request['imeiNumber'],
                "serialNumber"=>$request['serialNumber'],
                "simPhoneNumber"=>$request['simPhoneNumber'],
                "smsEmail"=>$request['smsEmail'],
                "displayColor"=>$request['displayColor'],
                "fuelCapacity"=>$request['fuelCapacity'],
                "driverID"=>$request['driverID'],
                "lastUpdateTime"=>time()));


        $data =      array("accountID" => $abc,
            "deviceID"=> $request['deviceID'],
            "groupID"=>$request['groupID[]'],
            "lastUpdateTime"=>time(),
            "creationTime"=>time());

        $ck = 0;
        $ck = DB::table('devicelist')->Insert($data);


        $devices = DB::table('device')->simplePaginate(10);
        return view('vehicle.vehicleAdmin')->with('devices', $devices);




    } catch (ModelNotFoundException $err) {
        //Show error page
    }

}

}

how can i write the function to store the data from multiselect drop down to my table each value in each row along with other value. Can anyone tell me what should i do? and how to write "string to array" conversion and "for loop" for the insertion

If you are getting array from multi select and want to insert it in one row. You should implode array into comma separated string then insert it in table

Implode function

$val = implode(",",$request['groupID[]']);

Then put $val into your $data array like

$data =      array("accountID" => $abc,
        "deviceID"=> $request['deviceID'],
        "groupID"=>$val,
        "lastUpdateTime"=>time(),
        "creationTime"=>time());

If you are getting string then explode it

Explode function

 $val = explode(",",$request['groupID[]']);
 $count = count($val);

 for($a=0; $a<$count; $a++){
 $data =      array("accountID" => $abc,
        "deviceID"=> $request['deviceID'],
        "groupID"=>$val[$a],
        "lastUpdateTime"=>time(),
        "creationTime"=>time());
}