PHPOffice / PhpSpreadsheet

        // ----- Creates a compressed temporary file

        $v_gzip_temp_name = PCLZIP_TEMPORARY_DIR . uniqid('pclzip-') . '.gz';

        if (($v_file_compressed = @gzopen($v_gzip_temp_name, 'wb')) == 0) {

            fclose($v_file);

            self::privErrorLog(PCLZIP_ERR_WRITE_OPEN_FAIL, 'Unable to open temporary file \'' . $v_gzip_temp_name . '\' in binary write mode');

            return self::errorCode();

        }

        // ----- Read the file by PCLZIP_READ_BLOCK_SIZE octets blocks

        $v_size = filesize($p_filename);

        // ----- Creates a temporary file

        $v_gzip_temp_name = PCLZIP_TEMPORARY_DIR . uniqid('pclzip-') . '.gz';

        if (($v_dest_file = @fopen($v_gzip_temp_name, 'wb')) == 0) {

            fclose($v_file);

            self::privErrorLog(PCLZIP_ERR_WRITE_OPEN_FAIL, 'Unable to open temporary file \'' . $v_gzip_temp_name . '\' in binary write mode');

            return self::errorCode();

        }

        // ----- Write gz file format header

        $v_binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($p_entry['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));

        }

        // ----- Open the temporary gz file

        if (($v_src_file = @gzopen($v_gzip_temp_name, 'rb')) == 0) {

            @fclose($v_dest_file);

            $p_entry['status'] = 'read_error';

            self::privErrorLog(PCLZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \'' . $v_gzip_temp_name . '\' in binary read mode');

            return self::errorCode();

        }

        // ----- Read the file by PCLZIP_READ_BLOCK_SIZE octets blocks

        $v_size = $p_entry['size'];