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Handling image uploads securely in PHP

Difficulty: 30 / 50
cloud upload

In this lesson, you will learn how to upload image files to the server with PHP. Specifically, you will go through every required validation that should be done when uploading files to the server.

This will make your upload scripts maintainable and most importantly secure.

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Setting up Sublime Linter on Ubuntu

Difficulty: 25 / 50
sublime-linter-screen

I recently switched to Ubuntu as my primary operating system and one of the issues I've encountered was setting up Sublime Linter to work properly with CSS, PHP and JavaScript linting. This gave me the idea to write this tutorial on how you can set Sublime Linter to play nicely on Ubuntu.

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Basic usage of closures in PHP

Difficulty: 30 / 50
php-closures

In this tutorial I will try to teach you about the basic uses of closures (aka anonymous functions) in PHP. You will learn how closures are used as callback functions and how they can inherit variables from the parent scope.

Closures have been introduced in PHP 5.3 and their most important use is for callback functions. Basically a closure in PHP is a function that can be created without a specified name - an anonymous function. Here's a closure function created as the second parameter of array_walk(). By specifying the $v parameter as a reference one can modify each value in the original array through the closure function.

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SSH shortcuts through Bash aliases on Ubuntu

Difficulty: 30 / 50
Ubuntu-Trusty-Tahr

In today's tutorial I will show you how to use Bash aliases to create 'shortcuts' to your ssh connections to remote servers on Ubuntu 14.04. This will save you a lot of typing and remembering which private key is used for which server.

All you need to do that is to type a few simple commands, so open up your terminal and follow the steps below. I also made a video so you can just watch the screen-cast at the bottom of the article.

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HTML for Beginners - Part 4 - Let's make a web page

Difficulty: 10 / 50
Nicely-positioned-elements

In my last tutorial on HTML for beginners, you've learned how to create a web page that contained an image and a title. The goal for today is to go one step further and create an actual design for our HTML web page.

You will learn what HTML5 tags you should use for the various sections of a web page and also how to apply CSS styling to change the appearance of your page.

Continue to the article to see how the page will look like once you've finished this step by step guide.

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