What are the potential pitfalls of using the PHP copy command for domain-to-domain file transfers?

One potential pitfall of using the PHP copy command for domain-to-domain file transfers is that it may not work if the allow_url_fopen setting is disabled in the PHP configuration. To solve this issue, you can use the cURL library in PHP to perform the file transfer instead. 

$source = 'http://example.com/file.txt';
$destination = 'http://example2.com/file.txt';

$ch = curl_init($source);
$fp = fopen($destination, 'w');

curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);

curl_exec($ch);

curl_close($ch);
fclose($fp);

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PHP copy command domain-to-domain file transfers potential pitfalls

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