Hi to all,
I was wondering if someone out there has had the same
problem as I have; fetching from an object a private array variable
through a get method. And instead of getting a copy of
the array, you get access to the original array, being able to access
the object's internal data!
I have tried my test script on a Linux 2.6.5 running PHP 5.0.4 and
on a FreeBSD 5.4 running PHP 5.0.5 obtaining the same results
on both systems. Bellow is the test script:
==========================================
#!/usr/local/bin/php
<?php
class Atom {
private $x=0;
public function __construct($x) {
$this->x = $x;
}
public function setX($x) {
$this->x = $x;
}
public function getX() {
return $this->x;
}
}
class Element {
private $atoms = array();
public function __construct($NMAX) {
for ($i = 0; $i < $NMAX; ++$i)
$this->atoms[] = new Atom($i);
}
public function setAtoms($atoms) {
$this->atoms = $atoms;
}
public function getAtoms() {
return $this->atoms;
}
}
echo "Starting testing on returning private member array variables\n";
echo "System details: PHP ".PHP_VERSION." on ".PHP_OS."\n";
$element = new Element(3);
$v = $element->getAtoms();
print_r($v);
$v[0]->setX(79);
print_r($v);
$w = $element->getAtoms();
print_r($w);
echo "Testing finished\n";
?>
==========================================
The results are :
==========================================
Starting testing on returning private member array variables
System details: PHP 5.0.4 on Linux
Array
(
[0] => Atom Object
(
[x:private] => 0
)
[1] => Atom Object
(
[x:private] => 1
)
[2] => Atom Object
(
[x:private] => 2
)
)
Array
(
[0] => Atom Object
(
[x:private] => 79
)
[1] => Atom Object
(
[x:private] => 1
)
[2] => Atom Object
(
[x:private] => 2
)
)
Array
(
[0] => Atom Object
(
[x:private] => 79
)
[1] => Atom Object
(
[x:private] => 1
)
[2] => Atom Object
(
[x:private] => 2
)
)
Testing finished
==========================================
Is this expected behavior, or shouldn't the third Array print-out
have also a zero in its first objects's x variable? Thanks to everyone for
their time.
--Best regards
FNanDO
