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# gzcompress

(PHP 4 )

gzcompress -- Compress a string

## Description

``string gzcompress` (string data [, int level])`

This function returns a compressed version of the input `data` using the ZLIB data format, or `FALSE` if an error is encountered. The optional parameter `level` can be given as 0 for no compression up to 9 for maximum compression.

For details on the ZLIB compression algorithm see the document "ZLIB Compressed Data Format Specification version 3.3" (RFC 1950).

> Note: This is not the same as gzip compression, which includes some header data. See gzencode() for gzip compression.

See also gzdeflate(), gzinflate(), gzuncompress(), gzencode().

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