How to Store multiple values in single field laravel

Storing Array is not allowed inside mysql DB

so You can convert it to json and do that

$status->language = json_encode($request->language);

or

$status->language = implode(',', $request->language);

You can insert comma
implode(",",$request['language'])

Here is how you need to do it in your controller

$status= new PostTable();
$language[] = $request->language
$status->language = json_encode($language);

please chnage your code becuase you are select multiple language so use implode function

 $status->language = $request->language;

CHANGE

 $status->language = implode(',', $request->language);

Here in from $request->language is an array.In php you gave a function implode() .The implode function in PHP is used to "join elements of an array with a string".So try This

$status->language = implode(',', $request->language); //in which how you want separte your array is the first param 

It will save your multiple data separate by a comma.For details: https://www.c-sharpcorner.com/UploadFile/051e29/implode-and-explode-function-in-php/

use serialize() function

$status->language = serialize($request->language);

you can unserialize later to use .

unserialize($request->language)

Try This method for multiple values:

 $user = User::find(auth()->user()->id);
 $categoriesString = implode(",", $request->get('categories'));
 $user->categories = $categoriesString;
 $user->save();

For Multiple Images:

$medical_record = [];
$image = $request->file('file_name');
if ($image) {
    foreach ($image as $files) {
        $destinationPath = storage_path('medical-records/');
        $profileImage = date('YmdHis') . uniqid() . $files->getClientOriginalExtension();
        $files->move($destinationPath, $profileImage);
        $medical_record[] ="$profileImage";         
    }
    $data['file_name'] = implode(",", $medical_record);
}