(PECL pecl_http >= 0.15.0)
http_deflate — Deflate data
$data
   [, int $flags = 0
  ] )Compress data with gzip, zlib AKA deflate or raw deflate encoding.
See the deflate constants table for possible values for the flags parameter.
data
     String containing the data that should be encoded
flags
     deflate options
   Returns the encoded string on success, or NULL on failure.