Class Php

class Employee {
    private $title;
    private $lastName;
    private $firstName;
    protected $salary;
    private $ratio = 0; 
    
    public function __construct($title, $firstName, $mainName, $salary ) { 
        $this->title     = $title;
        $this->firstName = $firstName;
        $this->lastName  = $mainName;
        $this->salary     = $salary;
    }
    function getSummaryLine() {
        $base  = "$this->title ( $this->lastName, ";
        $base .= "$this->firstName )"; 
        return $base;
    }
}
class Developer extends Employee {
    private $stayYear = 0;
    public function __construct($title, $firstName, $mainName, $salary, $stayYear ) { 
        parent::__construct($title, $firstName, $mainName, $salary );
        $this->stayYear = $stayYear;
    }
    public function getStayLength() {
        return $this->stayYear;
    }
    function getSummaryLine() {
        $base = parent::getSummaryLine();
        $base .= ": playing time - $this->stayYear";
        return $base;
    }
 
}
print get_parent_class( 'Developer' );
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