// uploading image to s3 from public folder

use Aws\S3\S3Client;
use AwsS3S3Client;


 $filename='group_image'.$group_id.'.jpg';

            // save image in output Buffer --
            ob_start();
            imagejpeg($outputImage,NULL,100);
            $imageFileContents = ob_get_contents();

            //  header('Content-Type: image/png');
            // imagepng($imageFileContents);

            // use AwsS3S3Client;
            $directory = 'uploads/images/'.$filename;

            // Create an Amazon S3 client object
            $client = S3Client::factory(array(

              'secret'  => 'RtzcCuO2yLnHWtFpjcpNaPHdFKhI4QfaICSngw4q',
              'key' => 'AKIAJAJRA6ZVHKUBHW7A'
            ));


            $context = stream_context_create(array(

                's3' => array(
                'ACL' => 'public-read'
              )
            ));

            // Register the stream wrapper from a client object
            $client->registerStreamWrapper();

            $bucket = 'momentsbucket';
            $key = $directory;

            // save content on S3 --
            $contents = file_put_contents("s3://{$bucket}/{$key}",$imageFileContents,0,$context);

            $size = filesize("s3://{$bucket}/{$key}");

            ob_end_clean();  // clear o/p buffer