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I am following the detailed instructions to install Civi under Wordpress. I am running a local development Wordpress site using MariaDB 10. I have downloaded and activated the CiviCRM plugin. The CiviCRM installer is accessible. I have created a new empty database and user for CiviCRM and I can get a full "Green" ("You're ready to install") from the installer. But when I click on "Check requirements and install" I get an error:

"Cannot open mysql://[user]:[password]@localhost:3307/[path_to_database]?new_link=true: DB Error: connect failed."

The server port number is correct for this installation.

Any idea where I can look for more detail on why the connection fails at this stage?

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  • The issue might be the [path_to_database], can you tell us what is the value for that? Also try to set your php.ini to make the default port for mysql and it should work.
    – Hassan Farooq
    Jan 15, 2018 at 18:25
  • Thanks. The [path_to_database] is @localhost:3307/run/mysqld/mysqld10.sock/databasename. I'll look at php.ini.
    – StigMil
    Jan 15, 2018 at 18:35
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    Normally for a tcp socket you don't include the "unix socket" path. Try just the database name, e.g. @localhost:3307/databasename
    – Demerit
    Jan 16, 2018 at 2:14

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The php mysql extension is no longer supported. Need to use mysqli. See https://civicrm.org/blog/totten/psa-please-verify-php-extension-mysqli

The web server log might also indicate the error.

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  • Many thanks. Running phpinfo shows that mysqli is enabled. But when I run the php command line query suggested in the link you posted, it returns "missing". So I'll keep looking at that. Thanks for the pointer.
    – StigMil
    Jan 14, 2018 at 22:15
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As suggested by demerit, it is not necessary to specify the "unix socket" path in the server details. On the "CiviCRM Installer" page, in the server details, enter only [servername] and optional [:port] if port is not default.

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