How can the issue of dead links in the PHP script be resolved?

Dead links in a PHP script can be resolved by using the PHP function `file_exists()` to check if the file exists before including or requiring it in the script. This way, we can avoid encountering errors when trying to access non-existent files.

if(file_exists('path/to/file.php')) {
    include 'path/to/file.php';
} else {
    echo 'File not found';
}