(PECL pecl_http:0.21.0-1.5.5)
ob_deflatehandler — Deflate output handler
For use with ob_start().
Note: This output handler can only be used once.
The deflate output buffer handler can only be used once.
It conflicts with ob_gzhandler() and zlib.output_compression as well and should not be used after mbstring extension's mb_output_handler() and session extension's URL-Rewriter (AKA session.use_trans_sid).