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This tutorial shows how to resolve the issue causing the "Cannot add header information – headers already sent" error message. <\/p>\r\n
It often occurs in WordPress, osCommerce, Drupal and VirtueMart templates and signalizes about Solution:<\/strong><\/p>\r\n For instance, if you are getting an error similar to this<\/p>\r\n Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers please do the following:<\/p>\r\n 1. Look for the first file mentioned in the error on your FTP and open it for editing. 2. Delete all spaces and blank lines under the last closing PHP tag ?><\/strong> if there are any. Save the 3. Look for empty lines and spaces before the first opening PHP tag <?php<\/strong> If there are any, remove them. Save the changes.<\/p>\r\n 4. Make sure there are no empty lines\/spaces between the closing and the next opening PHP 5. Refresh your browser window with your site opened in it to check if the problem is solved.<\/p>\r\n Important:<\/strong><\/p>\r\n Even if you checked EVERYHING mentioned above, but the error still persists: <\/p>\r\n 1) try another editor. Check the error file in a different problem.<\/p>\r\n For instance, Notepad in Unicode may add the byte order mark (BOM) character before <?, 2) simply turn off this error reporting by opening the error file or your index.php file and error_reporting(E_ALL ^ E_ WARNING);<\/strong><\/p>\r\n
\r\n Here are other variants of this problem:
\r\n Warning: Cannot send session cookie – headers already sent<\/strong>
\r\n Warning: Cannot send session cache limiter – headers already sent<\/strong><\/p>\r\n
\r\n an empty space or line in the file.<\/p>\r\n
\r\n already sent by (output started at \/public_html\/includes\/application_top.php:2)
\r\n in \/public_html\/includes\/functions\/sessions.php line 102<\/strong><\/em><\/strong><\/p>\r\n
\r\n In this particular case the file is called application_top.php<\/strong> located in the \/public_html\/includes\/<\/strong> folder (OsCommerce template). In your case the name of the file and its location are different.<\/p>\r\n
\r\n changes.<\/p>\r\n
\r\n tags. If there are any, remove them. Save the changes.<\/p>\r\n
\r\n which you can delete only a HEX-editor or in IDE. In DreamWeaver and Notepad it is not visible,
\r\n so make sure to save your file in UTF without BOM.<\/p>\r\n
\r\n adding<\/p>\r\n