for(;;) no longer works right.

Code like as follows hangs forever.

<?

 for(;;)
 {
 }

?>

Code like this gives a parser error.

<?

 for(Unset($z);;)
 {
 }

?>

<br>                                                                            
<b>Parse error</b>:  parse error, expecting `';'' in <b>y.php</b> on line <b>3</b><br>