Applicable to:
- Plesk Onyx for Linux
- Plesk Onyx 17.5 for Linux
Symptoms
-
CloudLinux 7.x with LVE Manager and CageFS support is used
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alt-php is enabled on the affected domain
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When trying to install WordPress via the tab Domains > example.com > WordPress > Install, one of the following errors is shown:
PHP Fatal error: Uncaught Error: Call to undefined function json_encode() in /usr/local/psa/admin/plib/modules/wp-toolkit/vendor/mustache/mustache/src/Mustache/Engine.php:637
Fatal error: Call to undefined function mysqli_connect() in /usr/local/psa/var/apspackages/c74e7822-0a26-42e8-9ea6-0c57a5edd8a9/cache/scripts/db-util.php on line 53
Error establishing a database connection. This either means that the username and password information in your `wp-config.php` file is incorrect or we can’t contact the database server at `localhost:3306`. This could mean your host’s database server is down.
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There following error appears in Plesk:
PLESK_ERROR: Unable to interact with the newly created WordPress instance. It may have become corrupted.
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Cloning a WordPress instance fails with the following error message:
PLESK_ERROR: Task is not responding: id=1331, pid=258404, type=ext-wp-toolkit-task\manage
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There are the following records in
/var/log/plesk/panel.logfile:CONFIG_TEXT: DEBUG [util_exec] [1137da7ae7e29729c434a89b417517e6-0] Finished in 0.24553s, Error code: 0, stdout: Your PHP installation appears to be missing the MySQL extension which is required by WordPress., stderr:
Cause
This is Plesk bug with ID PPPM-7237, which is planned to be fixed in next product updates.
Resolution
As a workaround do the following:
Click on a section to expand
- Go to Tools & Settings > PHP Settings > alt-phpXX
Where phpXX is version of PHP set up in for the affected domain under Plesk > Domains > example.com > PHP Selector. -
Enable the following extensions:
- mbstring
- mysqli
- json
- Click OK.
Click on a section to expand
Note: If direct SSH access to the server is not possible, contact the server administrator for further assistance.
-
Connect to the server via SSH
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Edit the
/opt/alt/phpXX/etc/php.d/default.inifile:Where phpXX is version of PHP set up in for the affected domain under Plesk > Domains > example.com > PHP Selector.
Make sure that mbstring, json and mysqli modules are enabled.extension=mbstring.so <---- Uncomment this line
;extension=bcmath.so
;extension=dom.so
extension=json.so <---- Uncomment this line
;extension=gd.so
;extension=posix.so
;extension=sockets.so
;extension=xmlreader.so
;extension=xmlwriter.so
;extension=zip.so
;extension=fileinfo.so
extension=mysqli.so <---- Add a new line
Comments
5 comments
Need to ensure cagefs is updated / restart your alt-php service or you may experience a post install issue of WordPress saying the mysql extension is missing
Example:
cagefsctl --force-update-etc
cagefsctl --force-update
cagefsctl --rebuild-alt-php-ini
service alt-php71-fpm restart
You dont need to log in to ssh, you can go to Tools & Settings > PHP Settings and enable mbstring, json and mysqli there :)
Hello @Lars-Erik,
Thank you for notice.
This article's author will review it soon.
Do you have some resolution for CloudLinux 6?
@Boss
We have yet to encounter this issue on CloudLinux 6, but the same logic must apply - enable required PHP extensions.
If the issue still persists, provide us with the new error message from '/var/log/plesk/panel.log'.
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