"Cannot declare class App\Http\Controllers\category because the name is already in use"

"Cannot declare class App\Http\Controllers\category because the name is already in use" how to fix it please someone explain me

namespace App\Http\Controllers;

use Illuminate\Http\Request; use App\category; class category extends Controller {

public function index(){
    return view('admin.category.category_entry');
}

public function save(Request $request){
    $categoryentry=new category();
    $categoryentry->name=$request->name;
    $categoryentry->description=$request-> description;
    $categoryentry->publication_status=$request->publication_status;
    $categoryentry->save();
    return redirect('/category/save')->with('msg','Data inserted');
}

}

via Chebli Mohamed