note 8487 modified in Classes and Objects by jmcastagnetto
| From: | jmcastagnetto@php.net | Date: | Thu, 14 Sep 2000 10:59:22 +0000 |
| Subject: | note 8487 modified in Classes and Objects by jmcastagnetto | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-4972@lists.php.net to get a copy of this message | ||
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[Editor's note: class casting per se is not part of the object/class implementation in PHP, but
code like the one in this note can kludge if you need it for very simple cases, more complex ones
are left to the imagination of the programmer:
<?php
class foo {
function foo($name="foo") {
$this->name=$name;
}
}
class bar extends foo {
function boom() {
echo "BOOOM!";
}
}
$f = new foo();
$temp = explode(":",serialize($f));
$temp[2] = "\"bar\"";
$b = unserialize(implode(":",$temp));
$b->boom();
?>
This forces $b to be an instance of "bar" using an object $f, an instance of
"foo"]
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About casting of object, say, i got:
class A extends B {
function A() {
$this->B();
}
....
}
$b = new B();
$a = new A();
I wanna have a object of class A with "content" of $b:
$a = (A) $b; // not a valid code,(right?) as for illustration.
http://www.php.net/manual/classes-and-objects.php