(PHP 4, PHP 5)
gzwrite — Binary-safe gz-file write
$zp
   , string $string
   [, int $length
  ] )
   gzwrite() writes the contents of
   string to the given gz-file.
  
zpThe gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen().
stringThe string to write.
length
       The number of uncompressed bytes to write. If supplied, writing will 
       stop after length (uncompressed) bytes have been
       written or the end of string is reached,
       whichever comes first.
      
Note:
Note that if the
lengthargument is given, then the magic_quotes_runtime configuration option will be ignored and no slashes will be stripped fromstring.
Returns the number of (uncompressed) bytes written to the given gz-file stream.
Example #1 gzwrite() example
<?php
$string = 'Some information to compress';
$gz = gzopen('somefile.gz','w9');
gzwrite($gz, $string);
gzclose($gz);
?>