CodeIgniter headers already sent error with differ

问题:

I have a Code Ignitor 1.7.2 application which runs on a Windows 7 Apache Server. I copied the Application to Windows Pro SP2 Apache Server. Than I am getting the error

A PHP Error was encountered Severity: Warning Message: Cannot modify header information - headers already sent Filename: helpers/url_helper.php Line Number: 0

I again copied the application another Windows 7 PC and it is working. Usually this error comes if any space issue.

Please help how to solve this error.

回答1:

please check whether you have 'echo'ed content the redirection page or diplayer any content in the redirection page

回答2:

Thanks for your comments. I found the Bug. I am using a function to detect the MAC address of the system where I am using ob_start() and ob_clean(). This is causing the error.

Thanks and solved the issue to find the mac address without using those methods.

Thanks to all