Deep Tech Point
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February 11, 2021 | Javascript

What is null in Javascript?

In JavaScript the value null represents the intentional absence of any object value. The value null is one of JavaScript’s primitive values and is treated as falsy for boolean operations. We could compare a value null to a similar primitive value – undefined. Undefined is an unintentional absence of any object value, and this “unintentional” is the thing that differentiates null from the undefined.

February 10, 2021 | PHP

The beauty of PHP is that you can do one thing in several different ways. And, yes, this is the case with PHP arrays too – they can be merged using the + array union operator or you could use the array_merge() function. However, there is a difference between array_merge and array + array, so let’s take a look at the functions we’re are dealing with.

February 4, 2021 | PHP

This article is going to focus on the comparison operator known as Equal Operator and presented as “==” or double equal sign, and the inbuilt strcmp() function. We are going to look at the differences and similarities between these two.

January 31, 2021 | Javascript

What if you are developing an application that requires a client to upload a file or an image and information about the image via RESTful API and you want the client to send data as JSON? The easy answer would be to perform two posts to REST API.
But is that even possible in a single request?

January 28, 2021 | PHP

You might get into a situation where you need to hook some PHP function. There are many reasons why you might need to do that. One of the most obvious cases is debugging. In PHP it is really easy to hook any function using override_function which overrides built-in functions. However, these simple “hacks” are practical only in conditions when you’re dealing with your own code or some relatively simple code you can change with ease.

In a more complex situation, like if you need to hook the PHP mail function without messing with some third-party source code you need to do it a bit differently.

January 27, 2021 | Javascript

Recently I’ve been running into problems trying to save JSON in the MySQL database. Even though MySQL supports JSON type for a while now, there are still plenty of gotchas while you work with it. The situation is pretty critical with special characters. This time we are going to be short and on the topic of invalid JSON characters.

January 18, 2021 | PHP

You could come into a situation where you are dealing with HTML special characters in some text. Ordinary users might not even notice these special characters exist because when they take a peek at a text in a browser these characters look exactly like normal characters do. However, if you – an advanced user – take a look into the page source, you’ll notice some very unusual presentations, (&amp; for &, &quot; for “, &lt; for <, &gt for > and so on). So, the question is – how do you convert this mumbo jumbo to normal characters?

January 9, 2021 | PHP

As you probably know it’s possible to install multiple versions of PHP on one server. For web servers, simply define which PHP version you want to use in your server’s configuration file. But how to do it for PHP cli?

January 6, 2021 | WordPress development

Since WordPress version 5.0, a new content editor with code name Gutenberg was enforced over the old one which was called Classic editor. Gutenberg editor, also known as Block editor, introduced a new way of formatting content. It supposed to simplify the already simple process for adding content so for some people, including me, it is just an overhead. Perhaps total beginners will enjoy its “helpfulness” but this tutorial is obviously not for them. So let’s see how to remove the new WordPress editor, including its CSS.

remove_gutenberg_and_bring_back_classic_editor();

January 2, 2021 | PHP

PHP can sometimes be confusing when it shouldn’t be. One area of confusion is the issue with “duplicate” built-in functions. I’m always inclined to think that language makers probably had a good reason to make duplicates and most of the time that is a good assumption.
But is it always true? Let’s see an example of echo end print functions. Technically speaking neither echo nor print are functions but language constructs so you don’t need to use parentheses with its arguments.

<?php
echo "get ready: ", 1, 2, 3, " go";  // outputs get ready: 123 go
print "get ready: 123 go";  // print can't handle multiple arguments like echo
?>