Image Processing

Alibaba Cloud OSS can process images on-the-fly. You can resize, crop, rotate, and add watermarks by passing the x-oss-process parameter.

Usage with getObject

You can download a processed version of an image directly:

$options = [
    OssClient::OSS_FILE_DOWNLOAD => "resized.jpg",
    OssClient::OSS_PROCESS => "image/resize,m_fixed,h_100,w_100",
];
$ossClient->getObject($bucket, "original.jpg", $options);

Common Operations

• Resize: image/resize,w_200 (Width to 200px)
• Rotate: image/rotate,90 (Rotate 90 degrees)
• Crop: image/crop,w_100,h_100,x_10,y_10 (Crop 100x100 starting at coordinates 10,10)
• Watermark: image/watermark,text_SGVsbG8= (Add text watermark)
• Format Conversion: image/format,png (Convert to PNG)

Generating a Processed URL

You can combine image processing with pre-signed URLs:

$options = [
    OssClient::OSS_PROCESS => "image/resize,w_500"
];
$signedUrl = $ossClient->signUrl($bucket, "photo.jpg", 3600, "GET", $options);