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<?php
/**
* PHPCoord.
*
* @author Doug Wright
*/
declare(strict_types=1);
namespace PHPCoord\CoordinateOperation;
use SplFileObject;
use ZipArchive;
use function assert;
use function file_exists;
use function sys_get_temp_dir;
use function str_ends_with;
* @internal
class GridFile extends SplFileObject
{
public function __construct(string $filename)
if (str_ends_with($filename, '.zip')) {
$zip = new ZipArchive();
$zip->open($filename);
$filename = sys_get_temp_dir() . '/' . $zip->getNameIndex(0); // only 1 file inside
if (!file_exists($filename)) {
$zip->extractTo(sys_get_temp_dir());
}
parent::__construct($filename);
public function fgets(): string
$result = parent::fgets();
assert($result !== false);
return $result;
public function fread(int $length): string
$result = parent::fread($length);
dvdoug /
PHPCoord
