Php/docs/function.deflate-add
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deflate_add
(PHP 7)
deflate_add — Incrementally deflate data
说明
deflate_add
( DeflateContext $context
, string $data
[, int $flush_mode
= ZLIB_SYNC_FLUSH
] ) : string|false
Incrementally deflates data in the specified context.
参数
context
- A context created with deflate_init().
data
- A 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 setZLIB_NO_FLUSH
to maximize compression, andZLIB_FINISH
to terminate with the last chunk of data. See the » zlib manual for a detailed description of these constants.
返回值
Returns a chunk of compressed data, 或者在失败时返回 false
.
错误/异常
If invalid arguments are given, an error of level
E_WARNING
is generated.
更新日志
版本 | 说明 |
---|---|
8.0.0 | context expects a DeflateContext
instance now; previously, a resource was expected. |