How can the user change the permissions of the folder to allow file copying?

To change the permissions of a folder to allow file copying, the user can use the `chmod()` function in PHP to modify the folder permissions. They can set the permissions to allow writing by using the appropriate octal value (e.g., 0777 for full permissions). After changing the permissions, the user should be able to copy files into the folder successfully.

$folderPath = 'path/to/folder';
$permissions = 0777; // set the permissions to allow writing
chmod($folderPath, $permissions);