How to change file content type of AWS s3 bucket before uploading in PHP

Question

I have the following code that allows me to successfully upload files to my S3 bucket.

$keyName = 'test_example/' . basename($_FILES["fileToUpload"]['tmp_name']);
$pathInS3 = 'https://s3.eu-west-2.amazonaws.com/' . $bucketName . '/' . $keyName;

//Add it to S3
try {

    $s3->putObject(
        array(
            'Bucket'=>$bucketName,
            'Key' => $keyName,
                        'contentType' => 'image/png',

            'SourceFile' => $keyName,
            'StorageClass' => 'REDUCED_REDUNDANCY'
        )
    );

} catch (S3Exception $e) {
    die('Error:' . $e->getMessage());
} catch (Exception $e) {
    die('Error:' . $e->getMessage());
}

The problem is that they download instead of displaying the image. I've looked around and tried adding: 'contentType' => 'image/png' and this doesn't change anything. The file is still uploaded as a Value application/octet-stream rather than a Jpg image. Is there a way to change this?

Answer 1

Well, for some reason.

'contentType' => 'picture/png',

doesn't work for me. Instead I used

'ContentType' => 'Text/Plain Text',

I can now view my images without downloading.