On Thursday, April 4, 2002, at 04:21 PM, Erik Price wrote:
> I looked in the manual, but didn't see anything about this. I've read
> that PHP isn't a true object-oriented language, but rather simulates
> elements of object-oriented programming. Can I write a class that
> performs operations and manipulates objects? Can objects be placed
> into arrays etc?
>
> Erik
>
The real hindrance I've come up against is that you can't do chained
method calls, otherwise objects perform pretty well as expected. Keep in
mind the difference between passing by reference and by copy, though, or
you'll find yourself updating a copy of an object somewhere instead of
the original.
-Steve
Here's some code I was just playing around with:
<?php
class classA {
function method1() {
return 1;
}
function method2() {
return 2;
}
}
class classB {
function method1($num = 0) {
return $num + 10;
}
function method2($num = 0) {
return $num+20;
}
}
class classC {
function echoMethod($object) {
return $object;
}
}
class classD {
function otherMethod1($object) {
return $object->method1();
}
function otherMethod2($object) {
return $object->method2();
}
}
$a = new classA;
$b = new classB;
$c = new classC;
$d = new classD;
print("a1: " . $a->method1() . "<br />\n");
print("a2: " . $a->method2() . "<br />\n");
print("b1: " . $b->method1($a->method1()) . "<br />\n");
print("b2: " . $b->method2($a->method2()) . "<br />\n");
print("d1: " . $d->otherMethod1($b) . "<br />\n");
print("d2: " . $d->otherMethod2($c->echoMethod($a)) . "<br />\n");
// this next line would generate a parse error
// print("c:a1: " . $c->echo($a)->method1() . "<br />\n");
// this outputs:
// a1: 1
// a2: 2
// b1: 11
// b2: 22
// d1: 10
// d2: 2
?>
>
>
>
>
> ----
>
> Erik Price
> Web Developer Temp
> Media Lab, H.H. Brown
> [EMAIL PROTECTED]
>
>
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