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# gzcompress

(PHP 4 >= 4.0.1, PHP 5)

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).

> 備注: 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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