<?php
/* gzip.php by detour@metalshell.com
 *
 * Use the zlib functions in php to compress a file.
 *
 * http://www.metalshell.com/
 *
 */
 
/* Clearly this string isn't worth compressing as it will get
   bigger with the headers, but you get the idea. */
$str = "Compressed string";
$gzfile = "/tmp/file.gz";
 
// Compress our string.
write_gzip_file($str, $gzfile);
 
// Read the compressed file and display it.
print read_gzip_file($gzfile);
 
 
function read_gzip_file($file) {
  // Open gzip for reading.
  $fpgz = gzopen($file, "r");
 
  // Read the data.
  $retval = gzread($fpgz, filesize($file));
 
  // Close the file.
  gzclose($fpgz);
 
  return $retval;
}
 
function write_gzip_file($data, $file) {
  // Open the gzip file stream. The 9 is the compression level.
  $fpgz = gzopen($file, "w9");
 
  // Compress as the string is written.
  gzwrite($fpgz, $data);
 
  // Close the stream.
  gzclose($fpgz);
}
 
?>