Process : Upgrade Magento version from 2.2 to 2.3

As per my client requirement, I tried to upgrade Magento from 2.2 to 2.3 as mentioned in this URL: https://devdocs.magento.com/guides/v2.3/comp-mgr/cli/cli-upgrade.html

All steps were run properly but after run composer update command it will throw following Fatal error after some time as per mention into the screenshot.

enter image description here

And then after exit from composer update command.

Please suggest me how can I fix this error ?.

Thanks in advance.


1 Answer 1


This error can be realted to PHP compatibility :

  • For Magento 2.3 : PHP 7.1

  • For Magento 2.2 : PHP 7.1 or PHP 7.0

Check your PHP version, and upgrade or downgrade PHP if needed.

You will never make Magento 2 works fine without the good version of PHP

  • Thanks for reply bro I used php 7.2 version and fresh installed magento 2.3.0 with php 7.2 works properly Apr 16, 2019 at 5:53
  • now working ? @YagnikSolanki Apr 16, 2019 at 5:54
  • No, Trying to upgrade magneto version in php version 7.1 and once it will upgrade than run with php version 7.2 I hope it works. Apr 17, 2019 at 6:04
  • I fixed above issue my way and magento was upgraded to 2.3.0 Apr 17, 2019 at 10:05

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