A collection of JavaScript tutorials to help you learn or sharpen your JavaScript skills.

The Width and Height of the browser Window can be obtained through the innerWidth and innerHeight properties; these can be checked by an event handler to detect resize events.

Why gmail might block your e-mail server, and what you can do to solve the problem.

This is why I decided to encrypt my new Flash Drive, and why I think you should too.

Validating user-input is one of the most important ways to increase security and prevent hacks; in this article, I will show how to easily validate GET and POST parameters, and prevent your app from being abused to send spam.

Skipped values are not necessarily an indication of problems, but you should still make sure not to run out of primary keys.

No! You do not need to publish your Wordpress Plugins under the GPL license.

How to most efficiently, only run a piece of code once at the beginning or end of a loop.

Why are we not allowed to have multiple properties in a single declaration?

Facebook messenger started showing a message saying that some features are not available in Europe.

How to correctly determine file system paths when developing for Wordpress and avoiding inconsistencies.

Traffic has drastically dropped again, and this is what I personally plan to do about it.

How to get around upload limits enforced by your PHP server settings when using the all-in one migration Wordpress plugin.

Sometimes you might encounter compatibility problems with Nextcloud when updating to the latest version of PHP, luckily we can just run multiple versions of PHP on the same server.

You may have wondered what the /etc/php/8.0/conf.d/ directory is for in Debian and Ubuntu, and whether it is better to edit the conf.d files than editing php.ini directly; find out in this Tutorial.

In this tutorial I will show you how you can install multiple PHP versions, on a server running Apache.

How to get rid of jQuery.fn.load() deprecated notices in Wordpress manually if you can not update.

You might encounter the Illegal mix of collations error if your table-columns is using an incorrect collation.

How to secure your Wordpress website by disabling write access to certain files and directories.

Should you use Wordfence or Malcare? And are they even sufficient security tools? Securing a Wordpress site with third party plugins and themes is probably harder than you think.

Backslashes in replacement string seem to disappear when the replacement is done using preg_replace

How to get a list of included files and know if a certain file was included by PHP.

Lean to find the common multiples between two numbers in PHP; the tutorial starts by teaching you about multiples, then moves on to common multiples.

This tutorial shows how to check if a number is a decimal number using the PHP floor function.