PHP object assign alway by reference
Different from what we discuss before about regular variable type, object assignment always by reference:
class A {
public $a = 'a';
}
$a = new A();
$b = clone $a;
$c = $a;
$b->a = 'b';
echo $a->a, "\n";
$c->a = 'c';
echo $a->a, "\n";
Output:
a c
We use clone to make a copy of object. Please note that default clone operation is shallow copy. You have to overload the __clone method if you want deep copy of the object.
