(PHP 7)
deflate_add — Incrementally deflate data
$context
, string $data
[, int $flush_mode = ZLIB_SYNC_FLUSH
] ) : string|falseIncrementally deflates data in the specified context.
contextA context created with deflate_init().
dataA chunk of data to compress.
flush_mode
One of ZLIB_BLOCK,
ZLIB_NO_FLUSH,
ZLIB_PARTIAL_FLUSH,
ZLIB_SYNC_FLUSH (default),
ZLIB_FULL_FLUSH, ZLIB_FINISH.
Normally you will want to set ZLIB_NO_FLUSH to
maximize compression, and ZLIB_FINISH to terminate
with the last chunk of data. See the » zlib manual for a
detailed description of these constants.
Returns a chunk of compressed data, 或者在失败时返回 FALSE.
If invalid arguments are given, an error of level
E_WARNING is generated.