Why does it say that the header has already been sent?

A

andrei20192018-07-29 21:22:03

PHP

andrei2019, 2018-07-29 21:22:03

The site works fine in Ubuntu, but it needed to be launched in Denwer on Win10 and here are the messages:
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at Z:\home\localhost \www\index.php:1) in Z:\home\localhost\www\index.php on line 1
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at Z:\home\localhost\www\index.php:1) in Z:\home\localhost\www\index.php on line 1

<?php session_start();  <--- специально на строку выше поднял, но ошибка не исчезла.
//phpinfo(8);
?>
<!DOCTYPE html>
<html lang="ru">
...

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D

DevMan, 2018-07-29
@andrei2019

wangyu: the file is saved encoded with bom.