Magento supports 7.0.2, 7.0.4, and 7.0.6 or later.

[hector_gray]

Hello

I have Magento 2.2.6 and updated php 7.1.14 , but the error message continues to appear

Anyone has an answer? Thanks!!!

[Manish Mittal]

Hello @hector_gray

Magento 2.2.6 should support php 7.1.14

For your ref, please find technology stack requirement: 

https://devdocs.magento.com/guides/v2.2/install-gde/system-requirements-tech.html

Let me know if you have any specific error.

[Manthan Dave]

Hi @hector_gray

Magento 2.2.6 supports PHP Version 7.0.13 - 7.0.x & PHP version 7.1.X

So the PHP version you have installed is supported by magento 2.2.6

Also we are not able to see your screenshot - so kindly upload it again or post the actual error which you are facing !

For full technical stack , i would suggest you to refer this link - https://devdocs.magento.com/guides/v2.2/install-gde/system-requirements-tech.html

Hope it helps !