class User{
public $company_name;
}
class Employer extends User{
public $fname;
public $sname;
}
this is the test.php i have created. I have included the class file.
$employer = new Employer();
$user = new User();
$employer->company_name = "Company name is ";
echo $user->company_name;
When i print the name nothing happens, please let me know what is the wrong with my code.
Your Employer class extends your User class but when you create your $user and $employer objects they are separate entities and unrelated.
Think of your objects like this:
$employer = new Employer();
// You now have $employer object with the following properties:
// $employer->company_name;
// $employer->fname;
// $employer->sname;
$user = new User();
// You now have $user object with the following properties:
// $user->company_name;
$employer->company_name = "Company name is ";
// You now have $employer object with the following properties:
// $employer->company_name = 'Company name is ';
// $employer->fname;
// $employer->sname;
echo $user->company_name;
// You currently have $user object with the following properties:
// $user->company_name; /* no value to echo! */
If you want to use inherited properties, it works more like this:
class User{
public $company_name;
function PrintCompanyName(){
echo 'My company name is ' . $this->company_name;
}
}
class Employer extends User{
public $fname;
public $sname;
}
$employer = new Employer();
$employer->company_name = 'Rasta Pasta';
$employer->PrintCompanyName(); //echoes 'My company name is Rasta Pasta.'
$employer is of class Employer which inherits class User. However, $user is of class $User which has absolutely nothing to do with your $employer object.Don't confuse your variables, $user and $employer, with classes. $user is an instance of class User, and $employer is an instance of class Employer, but they are separate variables.
You never set $user->company_name.
echo $employer->company_name;
You didn't assign something to $company_name of object $user; only to $employer.
You just have to echo
$employer->company_name;
or set
$user->company_name
to some value.
You do not have to create an instance of the parent class to work with a child class. In this case, the $employer inherits company_name from the User class.
