Storing filtering setup in database / url shortening

I did a script that stores a set of filter values in a database.

The user selects some values from the form and saves the filter setup to my MySQL database.

Once he has added a filter setup he can access it over a link. The result is taken from the MySQL database

and then it is deserialized, passed to a raw MongoDB query.

The question here, is this an acceptable way to do this? The script works properly.

Example object

O:8:"stdClass":1:{s:4:"zone";a:1:{s:3:"$in";a:1:{i:0;s:14:"items.name";}}}




       // adds a predefined filter to the database
        public function storeFilter()
        {
            $builder = new \stdClass();
            $inputArray = Input::toArray(); // Get all the user input

            if (array_key_exists('filters', $inputArray)) {
                $builder->filters = ['$in' => $inputArray['filters']];
            }

    // Serialize
            $serialize = serialize($builder);

   // Store filter
            $filter = Filters::firstOrNew([
                'md' => md5($serialize), // m5 the content to access it quickly over a route [display-finder/{md5}]
                'object' => $serialize,
                'user_id' => $user->id,
            ]);
            $filter->save();
        }

        public function displayResults()
        {

            $filter = Filters::where('md', '=', $id)->first(); // get the filter setting based on the md5
            $deserialize = unserialize($filter->object);
            $resultList = $this->searchWithFilter($deserialize); // do a raw mongodb query

            return view('_dev.someView', compact('resultList', 'user'));
        }

    // 
        protected function searchWithFilter($array)
        {

            $models = PredefinedFilter::raw(function ($collection) use (&$array) {
                return $collection->find(
                    $array, ["typeMap" => ['root' => 'array', 'document' => 'array']])
                    ->toArray();
            });
            return $models;
        }

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