From 90a0e8c26c07a4d39dd7124dd01ec150083d8d8a Mon Sep 17 00:00:00 2001
From: plegall <plg@piwigo.org>
Date: Sat, 3 Dec 2016 20:07:14 +0100
Subject: [PATCH] fixes #512, set session garbage collector probability

---
 include/common.inc.php         | 6 ++++++
 include/config_default.inc.php | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/include/common.inc.php b/include/common.inc.php
index 81b7352d2..d960d3f32 100644
--- a/include/common.inc.php
+++ b/include/common.inc.php
@@ -103,6 +103,12 @@ if(isset($conf['show_php_errors']) && !empty($conf['show_php_errors']))
   @ini_set('display_errors', true);
 }
 
+if ($conf['session_gc_probability'] > 0)
+{
+  @ini_set('session.gc_divisor', 100);
+  @ini_set('session.gc_probability', min((int)$conf['session_gc_probability'], 100));
+}
+
 include(PHPWG_ROOT_PATH . 'include/constants.php');
 include(PHPWG_ROOT_PATH . 'include/functions.inc.php');
 include(PHPWG_ROOT_PATH . 'include/template.class.php');
diff --git a/include/config_default.inc.php b/include/config_default.inc.php
index c3b36064f..acb25ef5d 100644
--- a/include/config_default.inc.php
+++ b/include/config_default.inc.php
@@ -422,6 +422,12 @@ $conf['session_length'] = 3600;
 // address
 $conf['session_use_ip_address'] = true;
 
+// Probability, on each page generated, to launch session garbage
+// collector. Integer value between 1 and 100, in %. 0 to disable and let
+// the system default behavior (on Debian-like, it's "never delete
+// session").
+$conf['session_gc_probability'] = 1;
+
 // +-----------------------------------------------------------------------+
 // |                            debug/performance                          |
 // +-----------------------------------------------------------------------+