PHP Cannot Connect to MySQL 8.0 : Server sent charset (255) unknown to the client. (Doc ID 2579799.1)

Last updated on AUGUST 22, 2019

Applies to:

MySQL Server - Version 8.0 and later
Information in this document applies to any platform.

A PHP application cannot connect to MySQL 8.0 (but earlier versions of 5.7, 5.6, 5.5 work okay).

Server was upgraded to MySQL 8.0, or the default character set was set to UTF8MB4.

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In this Document

Symptoms

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