How to download a file from a URL using cURL in PHP?

To download a file from a URL using cURL in PHP, you can use the following code:

<?php
// URL of the file to download
$url = "https://example.com/file.jpg";

// Destination path to save the downloaded file
$destination = "path/to/save/file.jpg";

// Initialize cURL session
$curl = curl_init();

// Set the URL to download
curl_setopt($curl, CURLOPT_URL, $url);

// Return the transfer as a string instead of outputting it directly
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

// Execute the cURL session
$data = curl_exec($curl);

// Check if an error occurred during the download
if ($data === false) {
    echo "cURL Error: " . curl_error($curl);
} else {
    // Save the downloaded file to the destination path
    file_put_contents($destination, $data);
    echo "File downloaded successfully.";
}

// Close cURL session
curl_close($curl);
?>

In this example, you need to specify the URL of the file you want to download using the $url variable. The downloaded file will be saved to the specified destination path using the $destination variable.

The cURL options CURLOPT_URL is set to the URL, and CURLOPT_RETURNTRANSFER is set to true to return the downloaded file as a string.

After executing the cURL session with curl_exec, you can check if any error occurred during the download using curl_error. If the download was successful, you can save the downloaded file to the destination path using file_put_contents.

Finally, make sure to close the cURL session using curl_close.