п»ї<pre>[RuntimeException] 
Could not start session because headers have already been sent. &quot;/home/c/cz69610/bitrix_zd5nq/public_html/sveden/education/filepdf.php&quot;:1. (0)
/home/c/cz69610/bitrix_zd5nq/public_html/bitrix/modules/main/lib/session/session.php:151
#0: Bitrix\Main\Session\Session-&gt;start()
	/home/c/cz69610/bitrix_zd5nq/public_html/bitrix/modules/main/lib/session/kernelsessionproxy.php:47
#1: Bitrix\Main\Session\KernelSessionProxy-&gt;start()
	/home/c/cz69610/bitrix_zd5nq/public_html/bitrix/modules/main/include.php:180
#2: require_once(string)
	/home/c/cz69610/bitrix_zd5nq/public_html/bitrix/modules/main/include/prolog_before.php:19
#3: require(string)
	/home/c/cz69610/bitrix_zd5nq/public_html/sveden/education/filepdf.php:2
----------
</pre>