PHP5 variable scope and class construction - php

Question

I'm having problems with accessing variables from my classes...
class getuser {
public function __construct($id) {
$userquery = "SELECT * FROM users WHERE id = ".$id."";
$userresult = mysql_query($userquery);
$this->user = array();
$idx = 0;
while($user = mysql_fetch_object($userresult)){
$this->user[$idx] = $user;
++$idx;
}
}
}
I'm setting this class in a global 'classes' file, and later on I pass through a user id into the following script:
$u = new getuser($userid);
foreach($u->user as $user){
echo $user->username;
}
I'm hoping that this will give me the name of the user but it's not, where am I going wrong?!
Thanks

Answer 1

please define your users member as public in your class like this
class getuser {
public $user = null;
//...
}

Answer 2

in order to access a class property, you have to declare it public or implement getters and setters (second solution is preferable)
class A {
public $foo;
//class methods
}
$a = new A();
$a->foo = 'whatever';
with getters and setters, one per property
class B {
private $foo2;
public function getFoo2() {
return $this->foo2;
}
public function setFoo2($value) {
$this->foo2 = $value;
}
}
$b = new B();
$b->setFoo2('whatever');
echo $b->getFoo2();
in your example:
class getuser {
private $user;
public function __construct($id) {
$userquery = "SELECT * FROM users WHERE id = ".$id."";
$userresult = mysql_query($userquery);
$this->user = array();
$idx = 0;
while($user = mysql_fetch_object($userresult)){
$this->user[$idx] = $user;
++$idx;
}
}
/* returns the property value */
public function getUser() {
return $this->user;
}
/* sets the property value */
public function setUser($value) {
$this->user = $value;
}
}
$u = new getuser($userid);
$users_list = $u->getUser();
foreach($users_list as $user) {
echo $user->username;
}