Hi all, I'm trying to learn object oriented PHP by porting some of the simple exercises I've learnt in Java to PHP. This is one of them, to calculate the total salary of 3 people.
I'm apparently having a problem with the array in the family class - php gives an error about "Undefined variable: a_family" on line 32. Could anybody point me in the correct direction?
<?php
class person {
private $name;
private $salary;
//constructor
function __construct($given_name, $given_salary) {
$this->name = $given_name;
$this->salary = $given_salary;
}
//getter for salary
function get_salary() {
return $this->salary;
}
}
class family {
private $a_family;
function __construct() {
$a_family = array();
}
function add_family_member($given_person) {
$a_family[] = $given_person;
}
function get_total_salary() {
$total_salary = 0;
foreach ($a_family as $member) {
$total_salary = $total_salary + $member->get_salary();
}
return $total_salary;
}
}
$mum = new person("Mummy", 500);
$dad = new person("Daddy", 1500);
$sis = new person("Sister", 20);
$my_family = new family();
$my_family->add_family_member($mum);
$my_family->add_family_member($dad);
$my_family->add_family_member($sis);
$family_income = $my_family->get_total_salary();
?>
<!-- start HTML -->
<html>
<head>
</head>
<body>
<p>My total family income is $<?php echo $family_income; ?>.</p>
</body>
</html>