How can the completion of a file download be determined when using CURL to fetch a file from a remote server in PHP?

To determine the completion of a file download when using CURL in PHP, you can utilize the CURLOPT_NOPROGRESS option along with a custom progress function. This function will be called by CURL during the download process, allowing you to track the progress and determine when the download is complete. 

// Initialize CURL session
$ch = curl_init();

// Set the URL to fetch the file from
curl_setopt($ch, CURLOPT_URL, 'http://example.com/file_to_download.zip');

// Set the option to not show progress
curl_setopt($ch, CURLOPT_NOPROGRESS, false);

// Set a custom progress function
curl_setopt($ch, CURLOPT_PROGRESSFUNCTION, function($resource, $download_size, $downloaded, $upload_size, $uploaded) {
    if($downloaded == $download_size) {
        echo 'Download complete!';
    }
});

// Execute the CURL session
curl_exec($ch);

// Close the CURL session
curl_close($ch);

Keywords

CURL file download completion remote server PHP

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