Php/docs/function.gzdeflate

• PHP Manual
• Zlib 函数
• Deflate a string

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|false

This function compresses the given string using the DEFLATE data format.

For details on the DEFLATE compression algorithm see the document "[http://www.faqs.org/rfcs/rfc1951 » 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;?>

参见

• gzinflate() - Inflate a deflated string
• gzcompress() - Compress a string
• gzuncompress() - Uncompress a compressed string
• gzencode() - Create a gzip compressed string