Make your own official WordPress plugins

Get to know the code editors: one is free and the other is paid.

Download Vagrant: www.vagrantup.com/downloads.html

Download Virtualbox: https://www.virtualbox.org/wiki/Downloads

Download GIT: https://git-scm.com/download/win

Vagrant Press: https://github.com/vagrantpress/vagrantpress
Vagrant manager: http://vagrantmanager.com/ 

To create a new virtual machine open the terminal, go to your website's folder and run:
git clone https://github.com/vagrantpress/vagrantpress new-website 

Once it’s done open the website and run: vagrant up
This way all the files are downloaded, and the installation is good to go.

Your website should be running at vagrantpress.dev

To log in to the local Wordpress installation the username is admin, the password is vagrant.

Get to know this plugin, and how it can make your live easier displaying JSON data feeds via shortcode.

Same method for mostly every plugin available.

Our plugin is called via shortcode, this means that the user just need to write [jsonReader src=”URL”] at WordPress text editor to get the data feed.

Json file content

{
  "id": 1,
  "name": "A green door",
  "price": 12.50,
  "tags": ["home", "green"]
}

Data is flowing but we need to clean and filter it

If you got lost at some point or  are spending too much time to find that little typo feel free to copy and paste the source code.

This plugin wasn’t fully written by me.
It’s a mix of two plugins:
QR user login plugin - https://github.com/acasado86/qr-user-login
Autologin Links - http://www.craftware.nl/wordpress-autologin/

That results in a plugin that works in every website.

The other plugins are open source, we’ll keep the same licensing and indicate the authors names on the description.

/*
Plugin Name: Login with QR
Description: Allow users to login using a link (QR code).
Version: 1.0.0
Author: DessainSaraiva
Author URI: https://github.com/jdsaraiva
License: GPLv2

This plugin uses code from:
QR user login plugin - https://github.com/acasado86/qr-user-login
acasado

Autologin Links - http://www.craftware.nl/wordpress-autologin/
Paul Konstantin Gerke

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

Let’s get the working part inside our plugin and make it roar!

As we saw at the beginning of this course the initial version of the plugin did not work on the server.
Let’s compress the one we modified, upload and try it,

This plugin appeared as a suggestion of a client that said: it would be awesome if the event managers couldn't use images that were currently in use. Some days later this function was implemented on the website, happy customer.

Like JSON reader this plugin will be fully written by us.

Run a function when the user saves the event, check the data and block it if needed

We are using transients to show the warning message 

Obrigado, thank you, gracias, merci, etc…