php: additional output from foreach of array - php

Question

i'm trying to refresh my memory of OO & array structure. i have,
class room{
private $people = array(
'name' => array(
'height' => null,
'age' => null
)
);
function set($list){
foreach($list as $person){
$this->people[$person['name']]['height'] = $person['height'];
$this->people[$person['name']]['age'] = $person['age'];
}
}
function print(){
foreach($this->people as $k => $v){
echo $k . "<br>";
echo $v['height'] . ":" . $v['age'] . "<br><br>";
}
}
}
$input = array( array('name' => 'John', 'height' => '6.4', 'age' => '20'),
array('name' => 'Jane', 'height' => '5.2', 'age' => '21')
);
$i = new room;
$i->set($input);
$i->print();
the output is,
name
:
John
6.4:20
Jane
5.2:21
i'm confused as why name : appears first, when the input array only contains 2 values of each person. i am unsure if i am using my arrays correctly, could someone point out my mistake?
My overall aim of this is to have correct understanding of arrays within arrays & how to best set & get the values

Answer 1

It's because you've initialised the $people array to contain those values
private $people = array(
'name' => array(
'height' => null,
'age' => null
)
);
Change it to:
private $people = array();

Answer 2

that's the good way to do it
your people class
class people {
//properties
private $name;
private $height;
private $age;
//setters
public function setName($name) {
$this->name = $name;
}
public function setHeight($height) {
$this->height = $height;
}
public function setAge($age) {
$this->age = $age;
}
//getters
public function getName() {
return $this->name;
}
public function getHeight() {
return $this->height;
}
public function getAge() {
return $this->age;
}
}
your room class
class room {
//properties
private $people = array();
//setters
public function setPeople($people) {
$this->people[] = $people;
}
//getters
public function getPeoples() {
return $this->people;
}
}
and how to control it in OOP
$people1 = new people();
$people1->setName('John');
$people1->setHeight('6.4');
$people1->setAge('20');
$people2 = new people();
$people2->setName('Jane');
$people2->setHeight('5.2');
$people2->setAge('21');
$room = new room();
$room->setPeople($people1);
$room->setPeople($people2);

Answer 3

// Removing people array initial data will solve the issue :)
class room{
private $people = array();
function set($list){
foreach($list as $person){
$this->people[$person['name']]['height'] = $person['height'];
$this->people[$person['name']]['age'] = $person['age'];
}
}
function print(){
foreach($this->people as $k => $v){
echo $k . "<br>";
echo $v['height'] . ":" . $v['age'] . "<br><br>";
}
}
}
$input = array( array('name' => 'John', 'height' => '6.4', 'age' => '20'),
array('name' => 'Jane', 'height' => '5.2', 'age' => '21')
);
$i = new room;
$i->set($input);
$i->print();