BiaoJiOk<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/header.php&quot;:1. (0)
/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/modules/main/lib/session/session.php:136
#0: Bitrix\Main\Session\Session-&gt;start()
	/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/modules/main/lib/session/kernelsessionproxy.php:42
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start()
	/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/modules/main/include.php:169
#2: require_once(string)
	/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/modules/main/include/prolog_before.php:14
#3: require_once(string)
	/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/modules/main/include/prolog.php:12
#4: require_once(string)
	/mnt/web/bitrix/ext_www/_common-bitrix/bitrix/header.php:1
#5: require(string)
	/mnt/web/bitrix/ext_www/lozovamachinery.upec.ua/index.php:3
----------
</pre>