uploading posted file to amazon s3 - php

Question

I'm trying to upload a file to Amazon S3 via Laravel 4.
After user submit a form, the file will be passed to a function where I need to use Amazon PHP SDK and upload the file to Amazon S3 bucket.
But how do I upload the file straight away to Amazon S3 without saving the file onto server.
My current code looks like this,
private function uploadVideo($vid){
$file = $vid;
$filename = $file->getClientOriginalName();
if (!class_exists('S3'))require_once('S3.php');
if (!defined('awsAccessKey')) define('awsAccessKey', '123123123');
if (!defined('awsSecretKey')) define('awsSecretKey', '123123123');
$s3 = new S3(awsAccessKey, awsSecretKey);
$s3->putBucket("mybucket", S3::ACL_PUBLIC_READ);
$s3->putObject($vid, "mybucket",$filename , S3::ACL_PUBLIC_READ);
}

Answer 1

Grab the official SDK from http://docs.aws.amazon.com/aws-sdk-php/latest/index.html
This example uses http://docs.aws.amazon.com/aws-sdk-php/latest/class-Aws.S3.S3Client.html#_upload
require('aws.phar');
use Aws\S3\S3Client;
use Aws\Common\Enum\Region;
// Instantiate the S3 client with your AWS credentials and desired AWS region
$client = S3Client::factory(array(
'key' => 'KEY HERE',
'secret' => 'SECRET HERE',
'region' => Region::AP_SOUTHEAST_2 // you will need to change or remove this
));
$result = $client->upload(
'BUCKET HERE',
'OBJECT KEY HERE',
'STRING OF YOUR FILE HERE',
'public-read' // public access ACL
);