What potential issues can arise when using URL file-access in PHP scripts?

Potential security issues can arise when using URL file-access in PHP scripts, as it can allow an attacker to access sensitive files on the server. To mitigate this risk, it is recommended to disable URL file-access in the PHP configuration by setting `allow_url_fopen` to `Off`. This prevents PHP from opening remote files using functions like `file_get_contents()`.

// Disable URL file-access in PHP
ini_set('allow_url_fopen', 0);