update wordpress in localhost

First of all backup your database follwing these insctructions.

  1. Get the latest WordPress zip (or tar.gz) file.
  2. Unpack the zip file that you downloaded.
  3. Deactivate plugins.
  4. Delete the old wp-includes and wp-admin directories on your web host (through your FTPor shell access).
  5. Using FTP or your shell access, upload the new wp-includes and wp-admin directories to your web host, in place of the previously deleted directories.
  6. Upload the individual files from the new wp-content folder to your existing wp-content folder, overwriting existing files. Do NOT delete your existing wp-content folder. Do NOT delete any files or folders in your existing wp-content directory (except for the one being overwritten by new files).
  7. Upload all new loose files from the root directory of the new version to your existing WordPress root directory.

NOTE – you should replace all the old WordPress files with the new ones in the wp-includes and wp-admin directories and sub-directories, and in the root directory (such as index.phpwp-login.php and so on). Don’t worry – your wp-config.php will be safe.

Be careful when you come to copying the wp-content directory. You should make sure that you only copy the files from inside this directory, rather than replacing your entire wp-content directory. This is where your themes and plugins live, so you will want to keep them. If you have customized the default or classic themes without renaming them, make sure not to overwrite those files, otherwise you will lose your changes. (Though you might want to compare them for new features or fixes..)

Lastly you should take a look at the wp-config-sample.php file, to see if any new settings have been introduced that you might want to add to your own wp-config.php.

More details here.

folding code in Kate

Today I noticed that if I write [b]BEGIN[/b] in a row that row is the beginning of a collapsable section, until a row with [b]END[/b].
F.e. /* — BEGIN common tags — / as beginnning and / — END common tags — */ as end.
And I can have nested collpsable sections, even in an html file ( , f. e.)

svg with external image embedded

All browsers have this limitation: they not allow to show an svg with an external image embedded, such as

<image x="2" y="2" width="somewidth" height="someheight" xlink:href="myimage.jpg">

even though the image is in local.

For security reasons.

expansible image with image-map

We managed to add an image map to the on-click expansible image.

This is the code:

<style type="text/css">
img[usemap] { zoom: 12%;}
img[usemap]:focus {zoom: 50%;}
<map name="mymap">
  <area shape="rect" coords="1294,253,1420,434" title="mount" />
  <area shape="rect" coords="1709,296,1835,477" title="tree" />
<img tabindex="0" src="path-to/myimage" usemap="#mymap" />

The problem is that to close the expansed image you must click either on a map area or outside the image.

on-click expansible image

We were looking for the simplest possible solution to enlarge an image on click, without javascript and with the least amount of code possible.

a first attempt

At first we found the pseudo-class focus as a solution: with this css code img:focus and in html (inside the img tag) tabindex="0".

In this way, the image expanded on click, but to make it return to the initial size, it was necessary to click outside the enlarged image. As in the following example:

an important step

Therefore we had to add other code, so that we could return to the original, small, size, clicking inside the image. We had to use the input tag.

This is the result:

This is the code:

<style type="text/css">
input:checked + label > img {max-width: 200px; transform:scale(1.0); left: 0px;}
input {display: none;}
img {
    max-width: 200px;
    transition: all 1s;
    transition:transform 0.25s ease;

img:focus {
    max-width: none;
    position: relative;
    left: 5%;
<p>This the result:</p>
<input type="checkbox" checked id="myimage" />
<label for="myimage">
<img tabindex="0" src="path-to-my-image/myimage.jpg" width="200px" />

fine tuning: adding an image map

We speak about this new feature in another article.

android mail app

K9-Mail is a good app, but unfortunately rarely updated, in the last year. Besides, it has had an annoying cryptography bug and a notification bug.

So we tried FairEmail, that is definitely more accessorized, but not really privacy-friendly as they pretend, and not so open source: impossible to contact the developer, and pro functionalities are blocked until you pay something.

So, we went back to K9-Mail, that is absolutely open-source, even more “spartan”, but in its latest release without cryptography bug and notification bug.

libreoffice 7 and autokey

To avoid a deal of errors with autokey (QT) in LibreOffice 7 (and KDE 5.20) it could be necessary install the KDE Frameworks 5 integration.
Here, at least, it worked.