What is the default lifetime of a session

Question

If I hit a page which calls session start    how long would I have to wait before I get a new session ID when I refresh the page

User · Answer

You can use something like ini set  session gc maxlifetime   28800      8   60   60 too

User · Answer

But watch out  on most xampp ampp    -setups and some linux destributions it s 0  which means the file will never get deleted until you do it within your script  or dirty via shell   PHP INI     Lifetime in seconds of cookie or  if 0  until browser is restarted    http   php net session cookie-lifetime session cookie lifetime   0

User · Answer

Check out php ini the value set for session gc maxlifetime is the ID lifetime in seconds   I believe the default is 1440 seconds  24 mins   http   www php net manual en session configuration php  Edit  As some comments point out  the above is not entirely accurate   A wonderful explanation of why  and how to implement session lifetimes is available here   How do I expire a PHP session after 30 minutes

User · Answer

According to a user on PHP net site  his efforts to keep session alive failed  so he had to make a workaround    lt  php   Lifetime   3600   separator    strstr strtoupper substr PHP OS  0  3     WIN                    DirectoryPath   dirname   FILE         separator SessionData     in Wamp for Windows the result for  DirectoryPath   would be C  wamp www your site SessionData  is dir  DirectoryPath  or mkdir  DirectoryPath  0777    if  ini get  session use trans sid      true        ini set  url rewriter tags            ini set  session use trans sid   false       ini set  session gc maxlifetime    Lifetime   ini set  session gc divisor    1    ini set  session gc probability    1    ini set  session cookie lifetime    0    ini set  session save path    DirectoryPath   session start       gt    In SessionData folder it will be stored text files for holding session information  each file would be have a name similar to  sess a big hash here

User · Answer

it depends on your php settings    use phpinfo   and take a look at the session chapter  There are values like session gc maxlifetime and session cache expire and session cookie lifetime which affects the sessions lifetime  EDIT  it s like Martin write before

User · Answer

The default in the php ini for the session gc maxlifetime directive  the  quot gc quot  is for garbage collection  is 1440 seconds or 24 minutes  See the Session Runtime Configuation page in the manual  http   www php net manual en session configuration php You can change this constant in the php ini or  httpd conf files if you have access to them  or in the local  htaccess file on your web site  To set the timeout to one hour using the  htaccess method  add this line to the  htaccess file in the root directory of the site  php value session gc maxlifetime  quot 3600 quot   Be careful if you are on a shared host or if you host more than one site where you have not changed the default  The default session location is the  tmp directory  and the garbage collection routine will run every 24 minutes for these other sites  and wipe out your sessions in the process  regardless of how long they should be kept   See the note on the manual page or this site for a better explanation  The answer to this is to move your sessions to another directory using session save path  This also helps prevent bad guys from hijacking your visitors  sessions from the default   tmp directory

[php] What is the default lifetime of a session?

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