If I understand you correctly you want to set up a reserve proxy for your images E.G your system downloads the images send to the browser so it can render them, and you don't want users to know your path / you don't want public read access on your bucket.
If that is the case you can use the following code to download the file via
$result = $client->getObject(array(
'Bucket' => $bucket,
'Key' => $keyname
));
header("Content-Type: {$result['ContentType']}");
echo $result['Body'];
this could then be set up on a specific URL with the key as a parameter or if your bucket is correctly secured you could just use the key name via GET E.G URL image.php?key=some/key/on/aws.jpg and use $keyname = $_GET['key'] inside your file.
If you're using a MySQL table to use a lookup it would be $id = $_GET['id']; and create a function that protects against SQL Injection and returns the key column then use that for your $keyname an example table would be
$keyname and that can be set by a mapping database table E.G
CREATE TABLE `proxy_map`(
`id` INT(11) NOT NULL PRIMARY KEY,
`key` TEXT NOT NULL
)
If you want to limit it so only this specific site can use it you can use a referrer check
$url = parse_url($_SERVER['HTTP_REFERER'] , PHP_URL_HOST);
if($url !== $_SERVER[HTTP_HOST]){ // assuming that the images are only loaded on the same site as this php script
http_response_code(404);
echo "<h1>File Not Found</h1><p>Sorry the file you were looking for could not be found</p>";
}
If you wish to allow the images from a set of sites E.G you have a subdomain setup you can use.
$url = parse_url($_SERVER['HTTP_REFERER'] , PHP_URL_HOST);
$allowedDomains = array(
$_SERVER[HTTP_HOST],
"www.example.com"
);
if(!in_array($url, $allowdDomains))
