What potential warning can occur when using file_get_contents in PHP and how can it be resolved?

When using file_get_contents in PHP to read a file from a remote server, a warning may occur if the allow_url_fopen setting in the php.ini file is disabled. This setting allows PHP to open files from URLs, and if it's disabled, file_get_contents will not be able to fetch remote files. To resolve this issue, you can use cURL to fetch the remote file instead, as cURL does not rely on the allow_url_fopen setting. 

// Using cURL to fetch remote file instead of file_get_contents
function get_remote_file($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($ch);
    curl_close($ch);
    return $output;
}

// Example usage
$remote_file = get_remote_file('https://example.com/file.txt');
echo $remote_file;

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