Next, I guess should be PHP and MySQL, after that, Wordpress

Advice from an actual developer:

You may have known this but HTML is a markup language, there is little to no logic required and it is not a programming language. HTML teaches absolutely no programming methodology. You may not like this, and this won't help you create websites directly but you need to learn programming methodology.

Once you have learned Java, PHP will be a walk in the park

see.stanford(dot)edu/see/courseinfo.aspx?coll=824a47e1-135f-4508-a5aa-866adcae1111

Stanford provides free computer science courses through YouTube. They're excellent and you will learn a lot from them.

Yes, I have to agree with MeanWalrus. I am also a web developer, and he is totally right. If you learn HTML & CSS, then you probably lean towards web design, NOT programming. So my suggestion is to learn PhotoShop and start making nice designs. Once you have good graphic skills, you will need HTML and CSS knowledge to create the page layout and leave the functionality to programmers.

If you really want to learn programming too, then you will need to focus on PHP/MySQL, but you must also have good knowledge of AJAX, jquery (of course JS too) if you want to keep in touch with today's technology and expectations from a modern, user friendly website.

What are you trying to achieve?

To get a job as a web developer? To design your own sites? etc.

If you get specific about that, I think the community can help you more.

HTML
CSS
Javascript/JQUERY (learn both at same time)
PHP/MSQL (learn both at same time)

Application of PHP and java script are not the same. Java script has its certain features but now a day, programmers are utilizing it only to add some effects of texts or other events. But PHP is fully a server side scripting language.

Javascript is a better langauge.

I do know of some good developers who work in PHP, but it is mostly popular among people who don't know what they are doing and don't make very much money.

A lot of heavy-hitters code in Javascript and Python. Its also possible to code server-side in Javascript using NodeJS; which is becoming more popular.

If you want to learn Javascript, read "Javascript, The Good Parts"

If you are going with PHP then please go on with this one. You don't have to watch back. Yes, along with PHP there are ASP.net or JSP. But you cannot do works with them all together.

That is essential for designing ,
for developing PHP is essential now and for storing data and retrieve it MySql is needed.

Since you are familiar working on the frontend, I'd move straight onto JS and jQuery as you will be working with the DOM. It ties in nicely and will give you a fuller perspective of how the frontend works.

You could then make a half-jump to AJAX which will require you to learn a server-side language (like PHP) and a database language (like SQL).

If you want to be a proper web developer you'll have to learn them both anyways. :p

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Look for clients

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Most of this thread is not really helpful FYI

Step 1. You already know HTML & CSS - so good start!

Step 2. Learn JavaScript or php.

If you choose JavaScript here, you will be able to make effects for forms and similar things you see on landing pages. Great skill for someone trying to make awesome landing pages.

If you choose php, you can set up things like split tests, dynamic info like putting PPC keywords onto your landing page (ie user searched 'Learn IM', your landing page will say This site will teach you all about 'Learn IM'!) stuff like that.

Step 3 - Learn the one you didn't choose for step 2.

Step 4 - Ajax

Step 5 - Get back to marketing!!!!!

Skip everything you have been told (jquery, java, etc) and go directly to PHP.

It is by far the easiest way you'll learn about standard programming logic.

Then you'll soon find out you need to get some sort of a database in order to really make something cool with it, for this the standard is to use MySQL.

Querying a database from a programmer's perspective is really child's play and you'll figure out it is way, way easier than what people normally say it is.

If you're on a PC you can set yourself up with a LAMP installation (Linux, Apache, MySQL, PHP -now people say it is Perl or Python but whatever-).

If you're on a Mac then look for a MAMP installation. (same as above, only for MacOS doh!).

Then it's time to look for some actual information to start coding around and there are TONS of free resources to learn PHP&MySQL.

There's a SitePoint book that will teach you right away called Build Your Own Database Driven Web Site Using PHP.

That same book will teach you how to setup your developing platform and how to start coding right away.

It is NOT meant to be the PHP bible but if you manage to get through all of it, you are expected to build dynamic websites without any problems.

And as an extra piece of motivation, you are going to understand quite well how to not only modify existing wordpress themes but also how to create your own including plugins.

Hope this helps! ;-)

Sergio

PS. You'll have to control pieces of code with PHP such as html, css and even javascript here and there and you'll start to see how everything (more developing languages) fall into place with time, just make sure you follow the RIGHT advice.

I you should go with PHP and MySql followed by javascript . I suggested you so because I myself did this (from
Learning PHP, MySQL, & JavaScript: A Step-by-Step Guide to Creating Dynamic Websites by Robin Nixon ) and found it comfortable .
and if you need any help then you can PM me .