Warning: session_start() [function.session-start]

Question

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent on line 2

I searched on every questions. I see the solve putting this on the top of the page.

I did:

<?php session_start();?>

got the same error. Can someone help?

Please also add line 1 of your code to the question - so far we only see line 2. — M8R-1jmw5r, Apr 12 '13 at 14:24

score 2 · Accepted Answer · answered Apr 12 '13 at 14:10

2

Cannot send session cache limiter - headers already sent

Always means that you have printed some content before. Check if there is no HTML code or any other echo`ed text.

answered Apr 12 '13 at 14:10

hsz

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Or whitespace, for that matter. Extra newlines at the top of the page could be the culprit. – gen_Eric Apr 12 '13 at 14:12
got it the problem on there is some wite spaces i removed them it works fine now – user2255821 Apr 12 '13 at 14:19
@user2255821 If you find my answer helpful, remember to mark it as accepted. – hsz Apr 12 '13 at 14:41
please tell me how i am new here? – user2255821 Apr 12 '13 at 15:15

score 1 · Answer 2 · edited May 23 '17 at 12:28

You should be generous to yourself and provide the information where the output started:

<?php    

if (headers_sent($filename, $linenum)) {
    trigger_error("Headers already sent in $filename on line $linenum", E_USER_ERROR);
} 

session_start();

?>

That should give you more information to easier troubleshoot the problem.

And the best book on Stackoverflow for that error message is:

Headers already sent by PHP

Warning: session_start() [function.session-start]

2 Answers2