You can use following function to extract .gz files in server directory
function extract_gz($outFileName)
{
//This input should be from somewhere else, hard-coded in this example
$file_name = $outFileName;
// Raising this value may increase performance
$buffer_size = 40960; // read 4kb at a time
$out_file_name = str_replace('.gz', '', $file_name);
// Open our files (in binary mode)
$file = gzopen($file_name, 'rb');
$out_file = fopen('extracted/'.$out_file_name, 'wb');
// Keep repeating until the end of the input file
while (!gzeof($file)) {
// Read buffer-size bytes
// Both fwrite and gzread and binary-safe
fwrite($out_file, gzread($file, $buffer_size));
}
// Files are done, close files
fclose($out_file);
gzclose($file);
}
If your file is too large, you can use add following code in the top of your PHP script:
ignore_user_abort(true); // Script will run in background even if you will close the browser
set_time_limit(0); // Set execution time unlimited