session_start error?

[sindiswa_99]

Hi All

Please help, I always get the error when I start my page with this function. Can somebody help me to understand it please.
Here is the error:
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Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:\Webroot\examples\user-authentication\basic\login.php:1) in C:\Webroot\examples\user-authentication\basic\login.php on line 3


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thank you
S

[kyberfabrikken]

You can't start sessions after output has been started. Put session_start() at the very top of your script.

[HaloprO]

You can also delay the output until the entire script has finished running, For this you would use output buffering:

    ob_start();
    echo 'sup';
    session_start();
    $_SESSION['cool'] = 'I am cool';
    echo ", $_SESSION[cool]";
    ob_flush();