Another breaking change involves opening the special "php://input" stream for decompression. In PHP 5.5, the following code would allow PHP to decode a gzip'd request input stream:
// Open the input stream for requests with Content-Encoding: gzip.
$input = gzopen('php://input','r');
// This has the same effect as fopen('compress.zlib://php://input','r').
// Get the decompressed request body.
However in PHP 5.6 this does not work. Instead PHP gives the following warning: gzopen(): cannot represent a stream of type Input as a File Descriptor.
It is unclear whether this is a bug or intentional, backward-incompatible change.