deflate_init — Initialize an incremental deflate context
$options= array() ] ) : resource
Initializes an incremental deflate context using the specified
Note that the
window option here only sets the window size
of the algorithm, differently from the zlib filters where the same parameter
also sets the encoding to use; the encoding must be set with the
Limitation: there is currently no way to set the header information on a GZIP
compressed stream, which are set as follows: GZIP signature
\x1f\x8B); compression method (
== DEFLATE); 6 zero bytes; the operating system set to the current system
\x00 = Windows,
\x03 = Unix, etc.)
One of the
An associative array which may contain the following elements:
The compression level in range -1..9; defaults to -1.
The compression memory level in range 1..9; defaults to 8.
The zlib window size (logarithmic) in range 8..15; defaults to 15.
ZLIB_DEFAULT_STRATEGY (the default).
Returns a deflate context resource (
FALSE on failure.
If an invalid option is passed to
options or the
context couldn't be created, an error of level