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How to Create a Simple WordPress Plugin, create wordpress plugin, wordpress plugin basics, getting started with wordpress plugin, wordpress plugin creationHello friends, I hope you all are doing great. In today’s tutorial, I am gonna show you How to Create a Simple WordPress Plugin. I am starting this new series on WordPress Plugins and we will cover everything from basics to pro. This WordPress Plugin series is gonna be a long one. As today’s our first post, so we are just gonna create a plugin and in later tutorials, we will add different features in it. I will try to cover all the basics but if you got into any trouble then ask in comments and I will try to resolve them out.

I have been working a lot these days on WordPress and have learnt many new things so I thought to share them on my blog. It will be helpful for computer software engineers, as if you have created your own site with WordPress then you must have thought about creating custom WordPress plugins as well. So, let’s get started with How to Create a Simple WordPress Plugin:

Note:

  • I would recommend you to use xampp and then install WordPress on it and test everything there.

Create a Simple WordPress Plugin

  • First of all, what you need to do is, you need to find the wp-config.php file in the root directory of your WordPress installation.
  • Open this file and place the below code in it:

define(‘WP_DEBUG’, true);

  • It will bring the WordPress in debugging mode and if we got any error while plugin development then we will also get the reason for that error.
  • If its already defined and set to False then you need to change it to True.
  • Now let’s create some files for our first plugin, so open the folder named wp-content in the root WordPress installation.
  • In this folder you will find a folder name Plugins, so open it up.
  • In Plugins folder, create a new folder and the name of the folder should be the name of your plugin.
  • So, I have renamed this new folder to NamePluginTEP as its my plugin name.
  • The name of your plugin must have to be unique because if we have the preexisting plugin with the same name then our plugin will not index.
  • So make sure your plugin’s name must be different.
  • Open this folder and now create a new php file with the same name so my file’s name will be NamePluginTEP.php.
  • For WordPress, it will be the main file of our plugin, it checks the name the file and compares it with name of the folder.
  • Now we have to add some code in this php file for basic configuration.
  • So place this code in the NamePluginTEP.php file:
<?php

/**
*
* @package NamePluginTEP
*
*/

/*

Plugin Name: NamePluginTEP
Plugin URI: https://www.theengineeringprojects.com/
Author: Syed Zain Nasir
Author URI: https://twitter.com/syedzainnasir
Description: It's our First Simple WordPress Plugin.
Version: 1.0.0
License: GPLv2

*/

?>
  • You have to copy and paste the above code as its the defined syntax by WordPress.
  • Now save your file and open the plugins page of your WordPress and if everything goes fine then you will get something as shown in below figure:

How to Create a Simple WordPress Plugin, create wordpress plugin, wordpress plugin basics, getting started with wordpress plugin, wordpress plugin creation




  • You can activate or deactivate this plugin but it’s not gonna make any change as its just created and doesn’t have any functions in it.
  • First of all, we need to secure our plugin so that if someone is accessing our plugin file externally then he can’t get it.
  • So, we need to add this line just below the copyrights:
defined( 'ABSPATH' ) or die( 'We are having an error.' );
  • So, if the user is accessing the file from ABSPATH (absolute path) then its fine otherwise generate an error and exit.
  • Now we need to create a new class for our plugin and the name of this class will be the same as our plugin’s name:
if ( !class_exists( 'NamePluginTEP' ) )
{
   class NamePluginTEP
   {
   }
   $namePluginTEP = new NamePluginTEP();
}
  • In the above code, first of all I have placed a check to see if the class already exists. It’s a safety precaution.
  • If the class doesn’t exist, then we have created a new class of the same name.
  • After the class, I have simply created a new instance of this class and saved it in a variable starting with small “n” while the class starts with capital “N”.
  • If you already know php, then it won’t be much of an issue for you as it’s simple object oriented programming.
  • So, now when our plugin is loaded then this class will be initialized.
  • Here’s the complete php code of our plugin:
<?php

/**
 *
 * @package NamePluginTEP
 *
 */

/*

Plugin Name: NamePluginTEP
Plugin URI: https://www.theengineeringprojects.com/
Author: Syed Zain Nasir
Author URI: https://twitter.com/syedzainnasir
Description: It's our First Simple WordPress Plugin.
Version: 1.0.0
License: GPLv2

*/

/*

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 3 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, see <https://www.gnu.org/licenses/>.

*/

defined( 'ABSPATH' ) or die( 'We are having an error.' );

if ( !class_exists( 'NamePluginTEP' ) )
{

   class NamePluginTEP
   {
   
   }

   $namePluginTEP = new NamePluginTEP();
}

  • Here’s our plugin in activate mode and there’s no error generated by it:

Add Basic Functions in WordPress Plugin, wordpress plugin creations, create wordpress plugin, add functions in wordpress plugin

That was all for today. I hope you can now easily create a simple WordPress plugin. I am not giving any files to download rite now as we have just covered the basics. In the next tutorial, we will have a look at How to Add Basic Functions in WordPress Plugin. So, will meet you guys in next tutorial. Till then take care and have fun !!! 🙂

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