wordpress payment plugin Part1

The Story

Hey there, how are you ? i want to write a little about my experince as a wordpress plugin developer in week one of 100DaysOfCode. you can find some of my plugin in github.

so let’s start to know what we need. and make a payment plugin like this : wp-zilon-woocommerce

Wordpress

i don’t want to explain what is the wordpress but you know wordpress is one of the popular CMS for make website and because Woocommerce, wordpress now is a good choice to make a shop Website.

we want to make a simple plugin here. so you need some basics tools like :

• Wordpress installed on a webservice (you can use remote host or install and configure Apache || if you are in windows use Xampp)
• not bad knowledge of PHP (you can grow in project so if you are not good in php also you can make it)
• a little funny code editor (i use both Vscode and Vim)

if you have a problem to make your enviroment tell me and i will help you as far as I can.

wordpress structure

when you install wordpress you have something like this :

- wp-admin/
- wp-include/
- wp-content/
    - plugins/
    - themes/
    - uploads/
    - upgrade/
    - and some other things...
- other files here...

we must to put our plugin in wp-content/plugins/. just choice a name for your plugin ( if you want to publish plugin in wordpress repo start name of your plugin must be include wp- character ) and make a folder in above directory. we must to make something like this :

- wp-content
    - plugins
        - PLUGIN_NAME
            - PLUGIN_NAME.php

• care about name choicing because duplicate name and functions will make confilict in wordpress.

plugin explain

we are in peace here :D and we need some comments in our plugin. something like this :

/*
Plugin name: NAME_OF_PLUGIN
Plugin URI: URL_OF_PLUGIN_HOME_PAGE
Description: EXPLAIN What is this :)
Version: 1.0.0
Author: what is your name ?
Author URI: have you a website ? if not put your github url :D
Text Domain: -e('NAME OF PLUGIN','NAME_OF_PLUGIN')
 */

• i will explain more about text domain in future.

• you must to put this comment on first of your plugin file.

detect a problem

in php user can access to you plugin directly. (it’s a problem for our wordpress security) worpdress has a easy way to fix this issue. you must to put defined('ABSPATH') || exit('No Direct Access.'); after <?php in your each file. this code will check if a ABSPATH (it’s a wordpress local variable) isset means user running this plugin how we want. but if not set means user want to make a not valid request to our serve and we must to kill this connection.

some usefull defines

it’s good to make some routes define in our plugin. always i will make this :

define('WP_ZILON_WOOCOMMERCE_DIR', plugin_dir_path(__FILE__));
define('WP_ZILON_WOOCOMMERCE_URL', plugin_dir_url(__FILE__));
define('WP_ZILON_WOOCOMMERCE_ASSETS_URL', trailingslashit(WP_ZILON_WOOCOMMERCE_URL.'assets/'));
define('WP_ZILON_WOOCOMMERCE_INC_DIR', trailingslashit(WP_ZILON_WOOCOMMERCE_DIR.'app/'));

this const variables will help us in future :)

start coding.

now your plugin is ready. i will show how to make shortcode in next part of this post.

be happy untile the next post :) good luck.