PHP sessions that have already been started

Question

In my PHP code  if a session has already started  and I try to start a new one  I get the following Notice      Notice  A session had already been started - ignoring session start     How can I avoid this

User · Answer

try this  if  isset   SESSION         session start        I suggest you to use ob start    before starting any sesson varriable  this should order you browser buffer   edit  Added an extra   after   SESSION

User · Answer

Only if you want to destroy previous session     lt  php     if  isset   SESSION                   session start               else               session destroy            session start             gt    or you can use  unset   SESSION  variable session  data      to destroy a particular session variable

User · Answer

session status       PHP SESSION ACTIVE    session start      Closed Game

User · Answer

Try   lt  php     if  isset   SESSION                   session start              gt

User · Answer

None of the above was suitable  without calling session start   in all php files that depend on  Session variables they will not be included  The Notice is so annoying and quickly fill up the Error log  The only solution that I can find that works is this          error reporting E ALL   E NOTICE       session start      A Bad fix   but it works

User · Answer

It would be more efficient    session start      Avoiding error handler in the screen  Best

User · Answer

You must of already called the session start maybe being called again through an include   if      SESSION        session start

User · Answer

Yes  you can detect if the session is already running by checking isset   SESSION   However the best answer is simply not to call session start   more than once   It should be called very early in your script  possibly even the first line  and then not called again   If you have it in more than one place in your code then you re asking to get this kind of bug  Cut it down so it s only in one place and can only be called once

User · Answer

lt  php if   session id                 session start        Basically  you need to check if a session was started before creating another one      more reading   On the other hand  you chose to destroy an existing session before creating another one using session destroy

User · Answer

If you want a new one  then do session destroy   before starting it  To check if its set before starting it  call session status       status   session status    if  status    PHP SESSION NONE         There is no active session     session start     else if  status    PHP SESSION DISABLED         Sessions are not available  else if  status    PHP SESSION ACTIVE         Destroy current and start new one     session destroy        session start        I would avoid checking the global   SESSION instead of  I am calling the session status   method since PHP implemented this function explicitly to      Expose session status via new function  session status   This is for  PHP   5 4 0

User · Answer

Simply use if statement  if  isset   SESSION                     session start             or check the session status with session status that Returns the current session status and if current session is already working then return with nothing else if session not working start the session  session status       PHP SESSION ACTIVE    session start

User · Answer

I encountered this issue while trying to fix   SESSION s blocking behavior   http   konrness com php5 how-to-prevent-blocking-php-requests      The session file remains locked until the script completes or the   session is manually closed    So  by default  a page should open a session in read-only mode  But once it s open in read-only  it has to be closed-and-reopened in to get it into write mode   const SESSION DEFAULT COOKIE LIFETIME   86400          Open  SESSION read-only     function OpenSessionReadOnly         session start                          cookie lifetime    gt  SESSION DEFAULT COOKIE LIFETIME                         read and close     gt  true        READ ACCESS FAST                                SESSION is now defined  Call WriteSessionValues   to write out values            SESSION is read-only by default  Call this function to save a new value    call this function like  WriteSessionValues   username   gt  login user        to set   SESSION  username          param array  values assoc array     function WriteSessionValues  values assoc array           this is required to close the read-only session and         not get a warning on the next line      session abort            now open the session with write access     session start    cookie lifetime    gt  SESSION DEFAULT COOKIE LIFETIME          foreach   values assoc array as  key   gt   value              SESSION   key      value            session write close        Write session data and end session      OpenSessionReadOnly       now reopen the session in read-only mode     OpenSessionReadOnly        start the session for this page   Then when you go to write some value   WriteSessionValues   username   gt  login user      The function takes an array of key  value pairs to make it even more efficient

[php] PHP sessions that have already been started

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