How to solve the problem of partial loading of images during parsing?

Question

PHP

Hello.
When parsing, it happens that the image is saved partially loaded, that is, half of the image is a gray background.
I solve the problem with sleep(1).
Is there any other way to make sure the image is fully loaded before downloading?
Thank you.
Data retrieval method:

public function parseProduct(array $page)
    {
        $this->page = $page;

        foreach ($this->page as $item) {
            $phpQuery = phpQuery::newDocument($item->getBody()->getContents());
            $catalog = $phpQuery->find('.img_big_img');
            $re = '~<td>Артикул: <span.*?">(?<articul>.*?)</span>.*?<td>Наименование: <span.*?">(?<name>.*?)</span>.*?<td>Цена: <span.*?">(?<price>.*?)</span>~s';
            preg_match_all($re, $phpQuery, $matches, PREG_SET_ORDER, 0);
            $imageExtension = pathinfo(pq($catalog)->attr('src'), PATHINFO_EXTENSION );
            for($i = 0; $i < count($matches); $i++){
                $productDataArr[] = [
                    'imageSrc' => pq($catalog)->attr('src'),
                    'imageName' => $matches[$i]['name'],
                    'productPrice' => $matches[$i]['price'],
                    'productArticul' => 'БЧ' . $matches[$i]['articul'],
                    'imageExtension' => $imageExtension,
                ];
            }
        }
        return $productDataArr;
    }

Preservation:

public function saveProduct($imageDir, array $imageInfo)
    {

        if (!file_exists('cover/' . $imageDir)) {
            mkdir('cover/' . $imageDir, 0777, true);
        }
        foreach ($imageInfo as $item) {
            copy($item['imageSrc'], 'cover/' . $imageDir . '/' . Helper::transliterate($item['productArticul']) . '.' . $item['imageExtension']);
           // sleep(rand(2, 4));
        }
      //  $this->saveProductDataToExcel($imageInfo, $imageDir);

    }

Answer 1

try file_get_contents