WordPress OOP Based Plugin Development

Object Oriented Approach is beneficial over  Procedural Approach in terms of code re-usability, providing much more organised structure to code, etc. So we will learn a basic of WordPress Object Oriented Plugin Development.

WordPress Object Oriented Plugin Development

So first of all we will start from initialising a class named WordPress.

<?php

class WordPress{
	
	function __construct(){

	}

}
new WordPress();
?>

Every class contains the “__construct” function. It is a constructor method for class based approach and “new” is used to create object of class.

<?php

class WordPress{
	
	function __construct(){

	}
	function first(){
            echo 'Hello World';
	}

}
$obj = new WordPress();
$obj->first();

Now let’s say we have a function named “first” and we want to get its content i.e. ‘Hello World’. So we will first create an object of class by using “new” and then we will call the function named “first” like $obj->first(), and it will simply print “Hello World”.

If we want to get the contents of function “first()” in the beginning then we can simply call this function in our constructor as:

<?php

class WordPress{
	
	function __construct(){
		$this->first();
	}
	function first(){

	}

}
$obj = new WordPress();

Now, as there are many predefined hooks in WordPress, so now a next pain we face is how to load a function when the particular hook fires.  So here is the simple solution.

<?php

class WordPress{
	
	function __construct(){

		add_action( 'hook_name', array( $this, 'first' ) );

	}
	function first(){
		echo 'Hello World';
	}

}
$obj = new WordPress();