What are the best practices for handling ranges in PHP when downloading files, especially for parallel loading of images?

When downloading files, especially for parallel loading of images, handling ranges in PHP is important to efficiently download and display images. One way to achieve this is by utilizing the HTTP "Range" header to specify the byte range of the file to download. By implementing range requests, you can download parts of the file concurrently, improving the overall download speed and user experience. 

$remoteFile = 'https://example.com/image.jpg';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $remoteFile);
curl_setopt($ch, CURLOPT_RANGE, '0-102400'); // Specify the byte range to download
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = curl_exec($ch);
curl_close($ch);

// Save the downloaded data to a local file
$localFile = 'image.jpg';
file_put_contents($localFile, $data);

Keywords

range file download parallel loading images PHP

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