Using ini_set directives for setting session timeout Do not use long life session IDs for this. If an auto-login feature is required, developers must implement their own secure auto-login feature. Most applications should use “0” for this. If developers set this other than 0, it may allow other users to use the session ID. Therefore, when the browser is terminated, the session ID cookie is deleted immediately. It informs browsers not to store the cookie to permanent storage. Defaults to 1440 (24 minutes).įind the directive okie_lifetime and set it to 0 (zero). Garbage collection may occur during session start (depending on session.gc_probability and session.gc_divisor). It specifies the number of seconds after which data will be seen as ‘garbage’ and potentially cleaned up. Developers should manage the lifetime of sessions with a timestamp by themselves. Reliance on this setting is not recommended. The session.gc_maxlifetime is a setting for deleting obsolete session ID. Using php.ini settings for session timeoutįind the directive session.gc_maxlifetime and choose smallest possible. okie_lifetime: It is used to set the expiration time limit for the PHPSESSID cookie.Īnother way to set PHP session timeout is by using the ini_set() function in a PHP script. Session.gc_maxlifetime: It is used to set the time limit in seconds to store the session information in the server for a long time. The timeout limit of the session in PHP is configured using two directives in the php.ini file: Read the Session timeout considerations in this article. So your sessions should not last longer than 30 minutes. The session expiration timeout values must be set accordingly with the purpose and nature of the web application, and balance security and usability, so that the user can comfortably complete the operations within the web application without his session frequently expiring… Common idle timeouts ranges are 2-5 minutes for high-value applications and 15- 30 minutes for low risk applications.”įrom the federal guideline perspective, the draft NIST 800-63B – Digital Identity Guidelines proposes the following recommendation for providing high confidence for authentication: “Reauthentication of the subscriber SHALL be repeated following no more than 30 minutes of user inactivity.” The shorter the session interval is, the lesser the time an attacker has to use the valid session ID. “Insufficient session expiration by the web application increases the exposure of other session-based attacks, as for the attacker to be able to reuse a valid session ID and hijack the associated session, it must still be active. OWASP, one of the most authoritative web application security standards organizations, says about session timeouts: Typically the default PHP session timeout is 24 minutes ( 1440 seconds), but your webhost may have altered the default to something else. The PHP session timeout depends on the server configuration or the relevant directives session.gc_maxlifetime in php.ini file. In this post we gonna learn how to change the PHP Session Timeout. PHP has a default timeout session limit and sometimes it is not the timeout your application needs. Unlike a cookie, the information is not stored on the end users computer but in the application server.įor security reasons, sessions has a time limit to exist than they expire. A session is a way to store information (in variables) to be used across multiple HTTP Requests, to simulate a “state” across pages navigation.
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