# UPGRADE Notice: Array to string conversion in ..Abstract.php

**URL:** <https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711>\
**Category:** Installation/Einstieg\
**Created:** [1. April 2016 um 11:26 UTC](https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711 "2016-04-01T11:26:31Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![saddamus](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@saddamus](https://forum.shopware.com/u/saddamus)\
**Post date:** [1. April 2016 um 11:26 UTC](https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711/1 "2016-04-01T11:26:31Z")

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Hello

Im trying to upgrade shopware from version 4.X to latest 5.

As a first step, I have updated PHP to version 5.5.9, but just after upgrade, im not able to access /backend due to following error:

**Notice** : Array to string conversion in **…engine/Library/Zend/Db/Adapter/Pdo/Abstract.php** on line **75**

I tried to google solution, but seems there was nobody having this issue before ☹

Not sure if this is related to database connection, just in case my config file is:

\<?php return array (  
 &nbsp; 'db' =\\> &nbsp; array ( &nbsp;&nbsp;&nbsp; 'username' =\\> 'root', &nbsp;&nbsp;&nbsp; 'password' =\\> 'complicated', &nbsp;&nbsp;&nbsp; 'host' =\\> 'localhost', &nbsp;&nbsp;&nbsp; 'port' =\\> '3306', &nbsp;&nbsp;&nbsp; 'dbname' =\\> 'shopware', &nbsp;&nbsp;&nbsp; 'front' =\\> array('showException' =\\> true) &nbsp; ), ); &nbsp; &nbsp;

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**Author:** ![TimmeHosting](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/timmehosting/32/15580_2.png) [@TimmeHosting](https://forum.shopware.com/u/TimmeHosting)\
**Post date:** [7. April 2016 um 21:56 UTC](https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711/2 "2016-04-07T21:56:32Z")

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Do you really have a "  
" in your config.php? If so, please remove it.

![](https://europe1.discourse-cdn.com/flex013/uploads/shopware/original/1X/385eaa628505df573ebf33722f780335f53ac1b2.png)

Timme Hosting - schnelles nginx-Hosting

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**Author:** ![steinsoftware](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@steinsoftware](https://forum.shopware.com/u/steinsoftware)\
**Post date:** [8. April 2016 um 06:36 UTC](https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711/3 "2016-04-08T06:36:59Z")

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he meant the

(strange forum code injection) - remove it if it really is in your config. It has nothing to do there.

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**Author:** ![saddamus](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@saddamus](https://forum.shopware.com/u/saddamus)\
**Post date:** [8. April 2016 um 09:20 UTC](https://forum.shopware.com/t/upgrade-notice-array-to-string-conversion-in-abstract-php/35711/4 "2016-04-08T09:20:29Z")

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I have already managed this, there were several issues, one was php config format, another was on php settings and other related to previously used theme.