function resizeImage($file, $size)
    {
            [$width, $height] = explode('x', $size);
           
            $sourceImage = imagecreatefromstring(file_get_contents($file));

            // Get the original image dimensions
            $sourceWidth = imagesx($sourceImage);
            $sourceHeight = imagesy($sourceImage);
        
            // Calculate the aspect ratios of both images
            $sourceAspectRatio = $sourceWidth / $sourceHeight;
            $targetAspectRatio = $width / $height;
        
            // Calculate the new dimensions for the resized image
            if ($sourceAspectRatio > $targetAspectRatio) {
                $resizeWidth = $width;
                $resizeHeight = $width / $sourceAspectRatio;
            } else {
                $resizeHeight = $height;
                $resizeWidth = $height * $sourceAspectRatio;
            }

            // Creating white background
            $targetImage = imagecreatetruecolor($width, $height);
            $whiteColor = imagecolorallocate($targetImage, 255, 255, 255);
            imagefill($targetImage, 0, 0, $whiteColor);
        
            // Calculate the center position for the resized image on the new background
            $centerX = ($width - $resizeWidth) / 2;
            $centerY = ($height - $resizeHeight) / 2;

            // Resize the source image to the calculated dimensions
            imagecopyresampled(
                $targetImage,
                $sourceImage,
                $centerX,
                $centerY,
                0,
                0,
                $resizeWidth,
                $resizeHeight,
                $sourceWidth,
                $sourceHeight
            );
            $outputImagePath = 'resized_image.png';
            imagepng($targetImage, $outputImagePath);

            return $outputImagePath; // Return output image
    }

composer create-project --prefer-dist laravel/laravel imageOptimization

composer require matthewbdaly/laravel-azure-storage

AZURE_STORAGE_CONTAINER=azure_container_name
AZURE_STORAGE_URL=https://azurestorageurl.blob.core.windows.net
AZURE_STORAGE_NAME=azureStorageName
AZURE_STORAGE_KEY=azureStorageKey

'azure' => [
            'driver'    => 'azure', // As this is the name of the driver, this MUST be set to "azure"
            'name'      => env('AZURE_STORAGE_NAME'),
            'key'       => env('AZURE_STORAGE_KEY'),
            'container' => env('AZURE_STORAGE_CONTAINER'),
            'url'       => env('AZURE_STORAGE_URL')
            'prefix'    => null,
        ]

php artisan make:controller ImageOptimizeController

<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\Storage;
use Illuminate\Http\Request;

class ImageOptimizeController extends Controller
{
    
    public function index()
    {
        return view('resize-image');
    }

    public function store(Request $request)
    {
        // Get the uploaded image from the request
        $image = $request->file('image');

        // Validate the image for acceptable image formats and max upload size(Max upto 5MB)
        $this->validate($request, [
            'image' => 'required|image|mimes:jpg,jpeg,png,gif|max:5120',
        ]);

        // Generate a unique filename for the uploaded image
        $timestamp = time();
        $imageName= $timestamp.'.'.$image->getClientOriginalExtension();

        // Saving original image to azure container
        $disk = Storage::disk('azure');
        $disk->put($imageName,file_get_contents($image));

        // Creating Multiple Image Copies of different sizes and saving to Azure blob container
        $sizes = ['240x100', '300x200', '900x300'];
        $this->resizeAndSaveToAzureBlob($image,$sizes,$imageName);
        
        //Send the user back to the upload page with success message and image URL in session
        return back()
            ->with('success','Image has successfully uploaded.');
    }

    function resizeAndSaveToAzureBlob($file, $sizes, $imgName)
    {
        foreach ($sizes as $size) {
            [$width, $height] = explode('x', $size);
           
            $sourceImage = imagecreatefromstring(file_get_contents($file));

            // Get the original image dimensions
            $sourceWidth = imagesx($sourceImage);
            $sourceHeight = imagesy($sourceImage);
        
            // Calculate the aspect ratios of both images
            $sourceAspectRatio = $sourceWidth / $sourceHeight;
            $targetAspectRatio = $width / $height;
        
            // Calculate the new dimensions for the resized image
            if ($sourceAspectRatio > $targetAspectRatio) {
                $resizeWidth = $width;
                $resizeHeight = $width / $sourceAspectRatio;
            } else {
                $resizeHeight = $height;
                $resizeWidth = $height * $sourceAspectRatio;
            }

            // Creating white background
            $targetImage = imagecreatetruecolor($width, $height);
            $whiteColor = imagecolorallocate($targetImage, 255, 255, 255);
            imagefill($targetImage, 0, 0, $whiteColor);
        
            // Calculate the center position for the resized image on the new background
            $centerX = ($width - $resizeWidth) / 2;
            $centerY = ($height - $resizeHeight) / 2;
            // Resize the source image to the calculated dimensions
            imagecopyresampled(
                $targetImage,
                $sourceImage,
                $centerX,
                $centerY,
                0,
                0,
                $resizeWidth,
                $resizeHeight,
                $sourceWidth,
                $sourceHeight
            );
            $outputImagePath = 'resized_image.png';
            imagepng($targetImage, $outputImagePath);
    
            // Generate a unique filename for the resized image
            $resizedFilename = $width . 'x' . $height . $imgName;
    
            // Save the resized image to Azure Blob Storage
            Storage::disk('azure')->put($resizedFilename, file_get_contents($outputImagePath));
        }
    }
}

<div class="container mt-5" style="max-width: 550px">
    <h2 class="mb-5">Image Resize Demo</h2>
    <form action="{{route('resizeImage')}}" method="post" enctype="multipart/form-data">
        @csrf
        @if ($message = Session::get('success'))
            <div class="alert alert-success">
                <strong>{{ $message }}</strong>
            </div>
        @endif

        @if (count($errors) > 0)
            <div class="alert alert-danger">
                <ul>
                    @foreach ($errors->all() as $error)
                        <li>{{ $error }}</li>
                    @endforeach
                </ul>
            </div>
        @endif
        <div class="custom-file">
            <input type="file" name="image" class="custom-file-input" id="chooseFile">
            <label class="custom-file-label" for="chooseFile">Select Image</label>
        </div>
        <button type="submit" name="submit" class="btn btn-outline-danger btn-block mt-4">
            Upload
        </button>
    </form>
</div>

// Show image upload form
Route::get('/image-resize', [ImageOptimizeController::class, 'index']);
// Resize and save image in folder
Route::post('/resize', [ImageOptimizeController::class, 'store'])->name('resizeImage');