<?php
/* sample code to show the implementation of adapter design pattern
 * http://royads.blogspot.com
*/
// This is my base class library with 2 basic methods
class employee
{
  private $first_name,$last_name;
  
  function __construct($fname,$lname)
  {
     $this->first_name = $fname;
     $this->last_name  = $lname;
  }
 
  public function getFirstName()
  {
    return $this->first_name;
  }

  public function getLastName()
  {
    return $this->last_name;
  }
}

// I need a single function now which will return full name. 
// But I cant change this class.

// Solution is to implement the adapter class for employee and create new function in this adapter class.
// so lets do it.

class employeeAdapter
{
  private $employee;
  
  function __construct(employee $employee)
  {
    $this->employee = $employee;
  }
  public function getFullname()
  {
    return $this->employee->getFirstName()." - ".$this->employee->getLastName();
  }
}
// Here I am just adapting the basic class methods in adapter class and not adding any new functionality in it. This is a way you can identify the adapter design pattern implementation.

$obj = new employee('firstname','lastname');
$objAdapter = new employeeAdapter($obj);
echo $objAdapter->getFullname();
?>

firstname - lastname