De-resolve symlinks from PHP's __FILE__

de-resolve-symlinks.php

<?php

function deResolveSymlinks($file)
{
    $included = get_included_files();
    
    if(array_search($file, $included) !== false) {
        return $file;
    }
    
    foreach($included as $include){
        if(is_link($include) && readlink($include) === $file) {
            // an included file resolves to __FILE__
            return $include;
        }
    }
    
    return false;
}

echo deResolveSymlinks(__FILE__) . PHP_EOL;

This doesn't work when the directory is the symlink rather than the php file directly.
In this case, it still resolves the symlink.

5 years later... is there a better solution ?