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arvind

sessions problem

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Hi all

i'm working on php and facing a session problem on my project.
this is running fine on windows but when i configured it on linux
it is showing following warnings

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /opt/lampp/htdocs/classes/database/mysql.inc.php:171) in /opt/lampp/htdocs/index.php on line 60

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /opt/lampp/htdocs/classes/database/mysql.inc.php:171) in /opt/lampp/htdocs/index.php

there is no echo statement before session_start() and  not a problem with whitespaces.

b,coz it is running fine on windows.
if u hav any idea about to solve this problem plz help me out.

Thanks in advance
Arvind 

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session_start() MUST be at the top of your script, before ANY html output. Have you read the [url=http://www.phpfreaks.com/forums/index.php/topic,37442.0.html]sticky[/url] in this forum?

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But if i placed it on top following errors occurs on any event

Fatal error: main() [function.main]: The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition <b>unknown</b> of the object you are trying to operate on was loaded _before_ the session was started in /opt/lampp/htdocs/index.php on line 155

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