exchange/app/Http/Controllers/ChinaBankSlipController.php

<?php

namespace App\Http\Controllers;

use App\ChinaBankSlip;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Validator;

class ChinaBankSlipController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        //
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function store(Request $request)
    {
        // Handle File Upload
        if($request->hasFile('china_bank_slips')){
            // Get filename with the extension
            $filenameWithExt = $request->file('china_bank_slips')->getClientOriginalName();
            // Get just filename
            $filename = pathinfo($filenameWithExt, PATHINFO_FILENAME);
            // Get just ext
            $extension = $request->file('china_bank_slips')->getClientOriginalExtension();
            // Filename to store
            $fileNameToStore= $filename.'_'.time().'.'.$extension;

            // File size checking
            $validator = Validator::make($request->all(), [
                'china_bank_slips'   => 'max:3072'
            ]);
            
            if($validator->fails())
            {
                return response()->json(['message'=>'Image too large, upload files up to 3 MB'], 400);
            }
            // Upload Image
            $path = $request->file('china_bank_slips')->storeAs('public/bankslip', $fileNameToStore);
        } else {
            $fileNameToStore = 'hello.jpg';
        }
        // Create Post
        $post = new ChinaBankSlip;
        $post->actual_transfer_amount = $request->input('actual_transfer_amount');
        $post->date = $request->input('date');
        $post->details = $request->input('details');
        $post->china_bank_slip_path = $fileNameToStore;
        $post->save();
        return response()->json(['message'=>$post], 200);
    }


    /**
     * Display the specified resource.
     *
     * @param  \App\ChinaBankSlip  $chinaBankSlip
     * @return \Illuminate\Http\Response
     */
    public function show(ChinaBankSlip $chinaBankSlip)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  \App\ChinaBankSlip  $chinaBankSlip
     * @return \Illuminate\Http\Response
     */
    public function edit(ChinaBankSlip $chinaBankSlip)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \App\ChinaBankSlip  $chinaBankSlip
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, ChinaBankSlip $chinaBankSlip)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\ChinaBankSlip  $chinaBankSlip
     * @return \Illuminate\Http\Response
     */
    public function destroy(ChinaBankSlip $chinaBankSlip)
    {
        //
    }
}