gzdeflate

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gzdeflate — Deflate a string

说明

gzdeflate ( string $data [, int $level = -1 [, int $encoding = ZLIB_ENCODING_RAW ]] ) : string

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).

参数

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.

范例

Example #1 gzdeflate() example

<?php
$compressed = gzdeflate('Compress me', 9);
echo $compressed;
?>

更新日志

版本 说明
5.4.0 Added encoding parameter.

参见