CODE EXAMPLE FOR PHP

laravel Postcontroller.php

<?php

namespace AppHttpControllers;

use AppModelsPost;
use AppHttpRequestsStorePostRequest;
use AppHttpRequestsUpdatePostRequest;
use IlluminateSupportFacadesAuth;
use IlluminateSupportFacadesGate;
use IlluminateSupportFacadesStorage;
use IlluminateSupportStr;

class PostController extends Controller
{

    public function __construct()
    {
        $this->middleware('auth')->except(['index','show']);
    }

    /**
     * Display a listing of the resource.
     *
     * @return IlluminateHttpResponse
     */
    public function index()
    {
    //
        return redirect()->route('index');
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return IlluminateHttpResponse
     */
    public function create()
    {
        //
        return view('post.create');
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  AppHttpRequestsStorePostRequest  $request
     * @return IlluminateHttpResponse
     */
    public function store(StorePostRequest $request)
    {

        $newName = "cover_".uniqid()."_".$request->file('cover')->extension();
        $request->file('cover')->storeAs("public/cover",$newName);

        $post = new Post();
        $post->title = $request->title;
        $post->slug = Str::slug($request->title);
        $post->description = $request->description;
        $post->excerpt = Str::words($request->description,50);
        $post->cover = $newName;
        $post->user_id = Auth::id();
        $post->save();


        return redirect()->route("index")->with('status','Post Created');

        return $request;
    }
    /**
     * Display the specified resource.
     *
     * @param  AppModelsPost  $post
     * @return IlluminateHttpResponse
     */
    public function show(Post $post)
    {
        return redirect()->route('post.detail',$post->slug);
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  AppModelsPost  $post
     * @return IlluminateHttpResponse
     */
    public function edit(Post $post)
    {
        //
        Gate::authorize('update',$post);
        return view('post.edit',compact('post'));
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  AppHttpRequestsUpdatePostRequest  $request
     * @param  AppModelsPost  $post
     * @return IlluminateHttpResponse
     */
    public function update(UpdatePostRequest $request, Post $post)
    {


        $post->title = $request->title;
        $post->slug = Str::slug($request->title);
        $post->description = $request->description;
        $post->excerpt = Str::words($request->description,50);

        if($request->hasFile('cover')){

//            delete old cover
            Storage::delete("public/cover/".$post->cover);

//            upload new cover
            $newName = "cover_".uniqid()."_".$request->file('cover')->extension();
            $request->file('cover')->storeAs("public/cover",$newName);

//            save to table
                $post->cover = $newName;
        }

            $post->update();

        return redirect()->route('post.detail',$post->slug)->with('status','Post Updated');
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  AppModelsPost  $post
     * @return IlluminateHttpResponse
     */
    public function destroy(Post $post)
    {
        //
        Gate::authorize('delete',$post);

        Storage::delete("public/cover/".$post->cover);
        $post->delete();
        return redirect()->route('index');
    }
}