   #PHP Manual Zlib Compression Functions gzclose gzdeflate

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                                  gzcompress

   (PHP 4 >= 4.0.1)
   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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