Cannot send session cache limiter - headers already sent

Question

Having a problem with sessions which is becoming very annoying  Every time I try to start a session on a particular page I get the following error    Warning  session start    function session-start   Cannot send session cache limiter - headers already sent  output started at              on line 23   using this code    lt  php session start    if isset   SESSION  user                    user     SESSION  user            echo   user         else               gt     Is it suggesting I ve already used session start      Ive had a look around but nothing really clears this up for me    Thanks

User · Accepted Answer

Headers already sent  means that your PHP script already sent the HTTP headers  and as such it can t make modifications to them now   Check that you don t send ANY content before calling session start  Better yet  just make session start the first thing you do in your PHP file  so put it at the absolute beginning  before all HTML etc

[php] "Cannot send session cache limiter - headers already sent"

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