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cannot send session cookie - headers already sent

Thread began 1/21/2012 8:19 pm by h150477 | Last modified 1/24/2012 7:02 am by h150477 | 3855 views | 2 replies

Jason ByrnesWebAssist

the headers already sent error is ussually caused by blank space or other output between PHP code bloacks.

see the following thread for details on troubleshooting the headers already sent error.


since the error is being reported at line 1, check these 2 possible causes as well:

Originally Said By: Jason Byrnes
  There are 2 other causes of the Headers already sent error besides output to the page. Look for these causes if the output is reported at line 1 in the error:
1) Using the virtual() function to include php files instead of require once:
<?php virtual('Connections/connEAF.php'); ?>

In Dreamweaver's site settings panel, the Local Info tab has a settings for "Links relative To" if you select Site Root (see the third screen shot), Dreamweaver will use the virtual() function for including files. You should set this to Document instead so that Dreamweaver will use the require_once() function.

2) The Unicode Signature (BOM) PHP bug. the forth screen shot shows the Title / Encoding category of the Page Properties screen (Modify - > Page Properties). Checking the Include Signature (BOM) option can cause the headers already sent error  

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