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Bug #76660 Cannot connect to mysql 8 using Php 7.2.8
Submitted: 2018-07-24 11:30 UTC Modified: 2019-12-27 15:36 UTC
Avg. Score:4.9 ± 0.4
Reproduced:30 of 31 (96.8%)
Same Version:25 (83.3%)
Same OS:17 (56.7%)
From: Frank dot Peters at mobil dot hessen dot de Assigned:
Status: Duplicate Package: PDO MySQL
PHP Version: 7.2.8 OS: Windows
Private report: No CVE-ID: None
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From: Frank dot Peters at mobil dot hessen dot de
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 [2018-07-24 11:30 UTC] Frank dot Peters at mobil dot hessen dot de
After upgrading to 7.2.8 from 7.2.7, no connection to mySql 8.0.11 can be made.
Using doctrine, the Error-msg is:

Type: PDOException
Message: PDO::__construct(): Unexpected server respose while doing caching_sha2 auth: 109
File: C:\my_project\vendor\doctrine\dbal\lib\Doctrine\DBAL\Driver\PDOConnection.php
Line: 46

Downgrading to 7.2.7 solves this issue.

This might be realated to Bug #76651, so in answer to the question there:
SELECT @@default_authentication_plugin
has the result


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 [2018-07-24 12:59 UTC]
Related to bug #76651.
 [2018-08-06 21:09 UTC] eugene at zhegan dot in
Same story here.
 [2018-08-20 13:13 UTC] danielpopiniuc at gmail dot com
If I attempt to connect to MySQL 8.0.12 under Windows 10 build 1703 with either PHP 7.2.8 or 7.2.9 I get back a fatal error.
But if I use another MySQL client like MySQL Workbench 8.0.12 and execute a successful query, repeating same connection attempt in same conditions it works smoothly every single time (of course, until MySQL server shuts down or restarts).
From this behavior I am guessing some sort of MySQL connection initialization is not implemented properly under Windows starting with PHP 7.2.8 (still is case in 7.2.9). Hope this helps.
 [2019-12-27 15:36 UTC]
-Status: Open +Status: Duplicate
 [2019-12-27 15:36 UTC]
caching_sha2_password support has been reverted from 7.2/7.3 shortly after, which "fixed" this issue there. The same issue for 7.4 is tracked at bug #78981.
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