What are the necessary steps to copy files from a local disk to a web server using PHP?

To copy files from a local disk to a web server using PHP, you can use the `copy()` function provided by PHP. This function takes two parameters - the source file path on the local disk and the destination file path on the web server. By using this function, you can easily transfer files from your local disk to the web server.

$sourceFile = '/path/to/local/file.txt';
$destinationFile = '/path/to/webserver/file.txt';

if(copy($sourceFile, $destinationFile)){
    echo 'File copied successfully!';
} else {
    echo 'Failed to copy file.';
}