PHP fails in urls with unicode

[one2]

In web site under Apache if the URL contains unicode, PHP fails. For example: URL: http://127.0.0.1/web/comentários.php PHP returns: "Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0

Fatal error: Unknown: Failed opening required 'C:/xampp/htdocs/web/comentários.php' (include_path='.;C:\xampp\php\PEAR') in Unknown on line 0"

Is there a way to avoid this issue? Thanks!