gzdeflate
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
gzdeflate — Deflate a string
說明
gzdeflate(string
$data, int $level = -1, int $encoding = ZLIB_ENCODING_RAW): string|false
This function compresses the given string using the DEFLATE
data format.
For details on the DEFLATE compression algorithm see the document "» DEFLATE Compressed Data Format Specification version 1.3" (RFC 1951).
參數
-
data -
The data to deflate.
-
level -
The level of compression. Can be given as 0 for no compression up to 9 for maximum compression. If not given, the default compression level will be the default compression level of the zlib library.
-
encoding -
One of
ZLIB_ENCODING_*constants.
返回值
The deflated string or false if an error occurred.
範例
示例 #1 gzdeflate() example
<?php
$compressed = gzdeflate('Compress me', 9);
echo $compressed;
?>
參見
- gzinflate() - Inflate a deflated string
- gzcompress() - Compress a string
- gzuncompress() - Uncompress a compressed string
- gzencode() - Create a gzip compressed string