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13 years ago

this example could help:

<?php
class A {
    public $testA = 1;
}  

class B {
    public $testB = "class B";
}  

$a = new A;
$b = $a;     
$b->testA = 2;

$c = new B;
$a = $c;

$a->testB = "Changed Class B";

echo "<br/> object a: "; var_dump($a);
echo "<br/> object b: "; var_dump($b);
echo "<br/> object c: "; var_dump($c);

// by reference 

$aa = new A;
$bb = &$aa;     
$bb->testA = 2;

$cc = new B;
$aa = $cc;

$aa->testB = "Changed Class B";

echo "<br/> object aa: "; var_dump($aa);
echo "<br/> object bb: "; var_dump($bb);
echo "<br/> object cc: "; var_dump($cc);

?>

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