Andis Tips

The JSON Format Explained

July 31, 2019 by Andi Horvath

The JSON format is a very popular format for exchanging data. It is very easy to use. Find out, how to use the JSON format. What is JSON? JSON stands for JavaScript Object Notation. The format is identical to the way, you would create objects in JavaScript. It is a great way to exchange data … Read more

PHP: Use Array Keys As Variables | extract()

July 29, 2019July 29, 2019 by Andi Horvath

Would you like to use an arrays key as a normal variable in PHP? Well, the extract() function is a great way to generate variables from an associative arrays keys. In this article I’ll show you how.

PHP: Convert An Array To JSON

July 27, 2019May 6, 2019 by Andi Horvath

Sometimes, when programming in PHP, you’ll need to convert an array to JSON. This enables you e.g. to retrieve data serverside through PHP and pass it to the client, which then can process this data with javascript. There are different ways to do that, e.g. via AJAX.
In this article I’ll show you, how easy it is to convert a PHP array into a JSON String.

PHP: Check If A Value Exists In An Array

April 29, 2019 by Andi Horvath

Let’s say, you have a value like e.g. a name and you’ll find out, whether this value exists in an array of names or not. How could you do this? Well, it’s quite simple. Here I’ll show you how.

JavaScript: Get A Random Item From An Array

February 12, 2019 by Andi Horvath

In one of my previous posts I’ve shown you how to get a random item from an array in PHP. Well, there is, of course, a way to do this in JavaScript as well. And it’s also very easy. Just declare someting like this:

<script>
var allItems = ['A', 'B', 'C', 1, 2, 3, 4, 5];
</script>

PHP: Find Out The Modification Time Of A File

February 8, 2019 by Andi Horvath

Do you want to find out the modification time of a file in your PHP script? Well, in this article you’ll find out how easy this is. 😉

PHP: Quickly Generate An Array From Variables With The compact() Function

November 30, 2018 by Andi Horvath

Do you want to build an array in PHP, which should contain existing variables? Well, there is an easy way to do this. PHP has a very cool function for this to do. You can use the variable’s name as the key and the variables value as the value.

PHP: How Can I Find Out, Whether A Number Is Odd Or Even With The Modulo Operator?

November 28, 2018 by Andi Horvath

There is a simple way in PHP to find out, wheather a number is odd or even. All you need is the modulo operator.

What is the modulo operator?

The modulo operator in PHP is represented by an %. With this operator you can determine the rest of an interger division.
Here’s an example:

HTML Codes For Playing Cards

November 26, 2018 by Andi Horvath

Would you like to display playing cards symbols like Diamonds, Hearts, Clubs and Spades on your HTML pages? Well, it’s quite simple. Just use the following HTML codes: Symbol Code HTML Diamonds ♦ ♦ &diams; Hearts ♥ ♥ &hearts; Clubs ♣ ♣ &clubs; Spades ♠ ♠ &spades; With the playing cards HTML codes you … Read more

3 Great HTML5 Attributes That Simplify Coding

July 3, 2018 by Andi Horvath

HTML5 offers a lot of new features, which were, in my opinion, long overdue. In this article i will show you three great new HTML5 attributes which will make coding your HTML5 Website easier.

placeholder-Attribute

Do you know this placeholder texts within form fields like e.g. “Enter your email adress here”? Well with HTML5 you can add placeholders quite easily to your form fields. Just add the placeholder attribute to your form tag. No Javascript or other hacks needed anymore.