From 4b5890a501120a3b4c39a4a6a88d2022469267af Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Wed, 29 May 2019 11:28:46 +0200
Subject: [PATCH] do NOT used persistent connections, if they are disabled in
 php.ini

---
 api/src/Db.php                       | 11 ++++++++++-
 setup/inc/class.setup_header.inc.php |  8 ++------
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/api/src/Db.php b/api/src/Db.php
index 25fb48239f..d12212f715 100644
--- a/api/src/Db.php
+++ b/api/src/Db.php
@@ -523,7 +523,11 @@ class Db
 					// set a connection timeout of 1 second, to allow quicker failover to other db-nodes (default is 20s)
 					$this->Link_ID->setConnectionParameter(MYSQLI_OPT_CONNECT_TIMEOUT, 1);
 				}
-				$connect = $GLOBALS['egw_info']['server']['db_persistent'] ? 'PConnect' : 'Connect';
+				$connect = $GLOBALS['egw_info']['server']['db_persistent'] &&
+					// do NOT attempt persistent connection, if it is switched off in php.ini (it will only cause a warning)
+					($Type !== 'mysqli' || ini_get('mysqli.allow_persistent')) ?
+					'PConnect' : 'Connect';
+
 				if (($Ok = $this->Link_ID->$connect($Host, $User, $Password, $Database)))
 				{
 					$this->ServerInfo = $this->Link_ID->ServerInfo();
@@ -1571,6 +1575,11 @@ class Db
 				{
 					$data = array_shift($data);
 				}
+				// array for SET or VALUES, not WHERE --> automatic store comma-separated
+				if (is_array($data) && $glue === ',' && in_array($column_type, ['varchar','ascii']))
+				{
+					$data = implode(',', $data);
+				}
 				if (is_array($data))
 				{
 					$or_null = '';
diff --git a/setup/inc/class.setup_header.inc.php b/setup/inc/class.setup_header.inc.php
index e184c2bd68..21a6344c74 100644
--- a/setup/inc/class.setup_header.inc.php
+++ b/setup/inc/class.setup_header.inc.php
@@ -159,12 +159,8 @@ class setup_header
 		{
 			foreach($egw_domains as $data)
 			{
-				error_clear_last();
-				// check for persistent connection
-				if (substr($data['db_type'], 0, 5) === 'mysql' &&
-					function_exists('mysqli_connect') &&
-					@mysqli_connect('p:'.$data['db_host']) &&
-					preg_match('/Persistent connections are disabled/i', error_get_last()))
+				// check if persistent connections are allowed
+				if (substr($data['db_type'], 0, 5) === 'mysql' && !ini_get('mysqli.allow_persistent'))
 				{
 					$persistent = false;
 					break;