Just like with if..endif, the syntax of while..endwhile has changed as well:
Пример D-7. Migration: old while..endwhile syntax
while ($more_to_come); ...endwhile;
Пример D-8. Migration: new while..endwhile syntax
while ($more_to_come): ...endwhile;
If you use the old while..endwhile syntax in PHP 3.0, you will get a never-ending loop.