Php/docs/function.inflate-init
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inflate_init
(PHP 7)
inflate_init — Initialize an incremental inflate context
说明
inflate_init
( int $encoding
[, array $options
= []
] ) : InflateContext|false
Initialize an incremental inflate context with the specified
encoding
.
参数
encoding
- One of the
ZLIB_ENCODING_*
constants. options
- An associative array which may contain the following elements:
level
- The compression level in range -1..9; defaults to -1.
memory
- The compression memory level in range 1..9; defaults to 8.
window
- The zlib window size (logarithmic) in range 8..15; defaults to 15.
strategy
- One of
ZLIB_FILTERED
,ZLIB_HUFFMAN_ONLY
,ZLIB_RLE
,ZLIB_FIXED
orZLIB_DEFAULT_STRATEGY
(the default). dictionary
- A string or an array of strings of the preset dictionary (default: no preset dictionary).
返回值
Returns an inflate context resource (zlib.inflate
) on
success, 或者在失败时返回 false
.
错误/异常
If an invalid encoding or option is passed to options
,
or the context couldn't be created, an error of level
E_WARNING
is generated.
更新日志
版本 | 说明 |
---|---|
8.0.0 | On success, this function returns an InflateContext instance now;
previously, a resource was returned. |
参见
- inflate_add() - Incrementally inflate encoded data
- deflate_init() - Initialize an incremental deflate context