Posted By

alvincrespo on 02/23/10

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Last Edited at 02/23/10 05:47pm

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PHP Beginning OOP

/ Published in: PHP

These are important object oriented principles (OOP) that one must understand in PHP to create dynamic web applications. I hope you find this useful in understanding inheritance.

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<?php 
/*
 * Author: Alvin Crespo
 * Date: 2/23/2010
 * 
 * Employee Class is the parent for the Manager subclass
 * 
 * */

class Employee{
	
	protected $fname; //protected variables and functions are passed to the subclass
	protected $lname;
	protected $salary = 32000;
	protected $position;
	
	function __construct($firstname, $lastname, $position){
		/*
		 * Methods pertaining to this class
		 * 
		 * */
		$this->SetFirstName($firstname);
		$this->SetLastName($lastname);
		$this->SetPosition($position);
	}
	
	/*
	 * User Private Information
	 * 
	 * */
	protected function SetLastName($lastname){
		$this->lname = $lastname;
	}
	protected function SetFirstName($firstname){
		$this->fname = $firstname;
	}	
	public function GetFirstName(){
		return $this->fname;
	}
	public function GetLastName(){
		return $this->lname;
	}
	
	/*
	 *User Work Information
	 * 
	 * */
	protected function SetSalary($salary){
		$this->salary = $salary;
	}
	public function GetSalary(){
		return "$".$this->salary;
	}
	protected function SetPosition($position){
		$this->position = $position;
	}
	public function GetPosition(){
		return $this->position;
	}
	
	function __destruct(){
		
	}
}

<?php

/*
 * Author: Alvin Crespo
 * Date: 2/23/2010
 * 
 * Class Manager is a sublass to Employee 
 * 
 * */

class Manager extends Employee{

function __construct($fname, $lname){
		/*
		 * These methods are located in the parent class Employee
		 * 
		 * */
		$this->SetLastName($lname);
		$this->SetFirstName($fname);
		$this->SetSalary(48000);
		$this->SetPosition('Manager');
	}
	
	function __destruct(){
	
	}
}
?>

/* This is what you would do in your .php file calling these functions*/

<?php 
		require_once 'classes/Employee.php';
		require_once 'classes/Manager.php';
		
		$employee = new Employee('jack','smith','Copywriter');
		echo "First Name: " . $employee->GetFirstName();
		echo " ";
		echo "Last Name: " . $employee->GetLastName();
		echo " ";
		echo "Salary: " . $employee->GetPosition();
		echo " ";
		echo "Salary: " . $employee->GetSalary();
		
		echo " ";
		$manager = new Manager('frank','josom');
		echo "First Name: " . $manager->GetFirstName();
		echo " ";
		echo "Last Name: " . $manager->GetLastName();
		echo " ";
		echo "Salary: " . $manager->GetPosition();
		echo " ";
		echo "Salary: " . $manager->GetSalary();
	?>

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