php - Page showing blank Laravel -

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i have laravel project that's supposed person's referral 3 levels deep. here controller query. 

public function matrix() {         $referrals = db::table('users')->where('referred_by', auth::user()->referral_id)->get();      if (empty($referrals))     {         return view('matrix');     }     elseif(isset($referrals[0]))     {         $referrals2gen = db::table('users')->where('referred_by', $referrals[0]->referral_id)->get();          if (!isset($referrals2gen[0]))          {             $referrals3gen = db::table('users')->where('referred_by', $referrals2gen[0]->referral_id)->get();              if (!isset($referrals3gen[0]))             {                 return view('matrix3', ['referrals' => $referrals, 'referrals2gen' => $referrals2gen]);             }             elseif(isset($referrals3gen[0]))             {                 return view('matrix4', ['referrals' => $referrals, 'referrals2gen' => $referrals2gen, 'referrals3gen' => $referrals3gen]);             }          }     } }

if user has referrals returns normal view. if doesnt retruns blank page. appreciate whatsover. note: know not dry beginner , have been having issues these while

why querying in controller.. best way solve problem easier create repository , leave controller clean. , query better use eloquent simple

here link

https://bosnadev.com/2015/03/07/using-repository-pattern-in-laravel-5/





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