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File -> Settings -> Languages & Framework > PHP -> Choose correct interpreter for PHP -> Apply

To solve this issue using Ubuntu or Elementary OS, we should run this command:

curl http://packages.elementary.io/key.asc | sudo apt-key add -
cat ~/.ssh/id_rsa.pub | ssh user@hostname 'cat >> .ssh/authorized_keys'

I had this problem trying to configure one Elastic Search instance. Seems that this issue is related with low space in your hard drive. Try to make more space in your hard drive or use:

docker rmi $(docker images -q --filter "dangling=true")

This issue got resolved adding this parameters to the Elastic Search configuration (elasticsearch.xml or docker-composer.xml):

cluster.routing.allocation.disk.threshold_enabled: false
cluster.routing.allocation.disk.watermark.low: 500mb
cluster.routing.allocation.disk.watermark.high: 600mb
cluster.info.update.interval: 1m

We are very happy to announce the release of jUpgradePro v3.9.0. In this version we tried to focus on the excess weight of the package because the composer libraries dragged a lot of ballast. Also we focus on Joomla! 3.9 compatibility and working for support Joomla! 4.0 soon!

The list of changes and features:

• Fix `composer install` issues

Decrease in package weight

• Joomla! 3.9 compatibility

• Fix problems migrating from Joomla! 1.0

• Huge list of small issues

Compatibility

jUpgradePro v3.9.0 is developed only for Joomla! 3.8 and greater. If you use Joomla! 3.7 or less, we strongly recommend to use jUpgradePro 3.4.

Documentation

https://matware.com.ar/projects/jupgradepro/jupgradepro-documentation/jupgradepro-table-of-contents.html

Subscription

https://matware.com.ar/subscriptions/jupgradepro-subscription.html

Sometimes if we read an external document like a PDF we got some 'strange' whitespace characters that cannot be removed using trim(), so one good solution for this is to use str_replace()

$value = str_replace("\xA0", ' ', $value);

This way replaces the non existing IS_NUMERIC() function in MySQL:

SELECT unit FROM testTable WHERE unit NOT REGEXP '^[+-]?[0-9]*([0-9]\\.|[0-9]|\\.[0-9])[0-9]*(e[+-]?[0-9]+)?$'

Sometimes we need to look for first letter of one column so we can use this syntax:

SELECT * FROM testTable WHERE LEFT (name, 1) = 'H';

We are very happy to announce the release of jUpgradePro v3.8.1 after long time without updates. In last version (3.8.0) we included into the package the external libraries that we use into our code, like jUpgradeNext, that is the base libraries of jUpgradePro. The problem with this is that zip file increase the size to up of 10 megabytes and that produces some error when we install the extension in some ISP with the upload limit below this size. Why i explain this? Because now with this new version, the process of the installation of Composer libraries is via web, into the jUpgradePro console.

The list of changes and features:

• Use Composer to install libraries via web
• Fix problems with aliases
• Huge list of small issues

Compatibility

jUpgradePro v3.8.0 is developed only for Joomla! 3.8 and greater. If you use Joomla! 3.7 or less, we strongly recommend to use jUpgradePro 3.4.

Documentation

https://matware.com.ar/projects/jupgradepro/jupgradepro-documentation/jupgradepro-table-of-contents.html

Subscription

https://matware.com.ar/subscriptions/jupgradepro-subscription.html

Most MySQL configurations come by default to allow only local connections. We must to change my.cnf file in /etc/mysql directory.

Search this line:

bind-address        = 127.0.0.1

And change for this line:

bind-address            = 0.0.0.0

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