Signed Access Signatures and PHP SDK for Windows Azure

The latest Windows Azure storage release featured a new concept: “Shared Access Signatures”. The idea of those is that you can create signatures for specific resources in blob storage and that you can provide more granular access than the default “all-or-nothing” approach that is taken by Azure blob storage. Steve Marx posted a sample on this, demonstrating how you can provide read access to a blob for a specified amount of minutes, after which the access is revoked. The PHP SDK for Windows Azure is now equipped with a credentials mechanism, based on Signed Access Signatures. Let’s see if we can demonstrate how this would work…