PHP hint failed to write session data error resolution, failedsession_php tutorial

PHP prompt failed to write session data error resolution, Failedsession

In this paper, the resolution of PHP hint failed to write session data error is analyzed in detail. Share to everyone for your reference. Here's how:

First, the question:

Hint message:warning:failed to write session data (files). Verify the current setting of Session.save_path was correct () in Unknown on line 0

Second, the solution:

The code is as follows: copy code code as follows: Session.save_path = "D:/phprun/tmp"

This is a custom folder to point to the error caused by default, the system does not appear, and sometimes it is possible that the directory does not write permissions, so everyone gives permission to.

Because of PHP's working mechanism, it does not have a daemon thread to periodically scan the session information and determine whether it is invalid, when a valid request occurs, PHP will be based on global variables session.gc_probability and SESSION.GC_ The value of divisor to determine whether a GC is enabled, by default, Session.gc_probability=1, session.gc_divisor = 100 which means there is a 1% possibility to start the GC ( This means that only one GC in 100 requests starts with one of the 100 requests.

PHP garbage collection mechanism is to scan all the session information, with the current time minus the last time the session was modified, compared with the session.gc_maxlifetime parameter, if the survival time exceeds gc_maxlifetime (default 24 minutes ), the session is deleted.

However, if your Web server has multiple sites, multiple sites, GC processing sessions can have unexpected results because the GC does not differentiate between sessions at different sites when it is working.

I hope this article is helpful to everyone's PHP programming.

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