function main()
{
$k = new Foo("something");
echo $k->getX();
echo "\n";
$k->setX("foo");
echo $k->getX();
echo "\n";
$k->setXVerified("string");
echo $k->getX();
echo "\n";
$k->setY(new Bar());
}
</head>
<body>
<?php
// Some simple OOP in PHP.
if (isset($theFoo)) {
echo "Object ", $theFoo, " has been restored <br/>";
} else {
// Creating a new object looks a lot like Java
$fooVar = new Foo(77, 88, 99);
// When using the object in a String context, the "magic" toString()
// method will implicitly be called. See Foo.php.
echo "fooVar is ", $fooVar, "<br/>";
// Unlike Java (but like C++) we use the arrow notation rather than the
// "dot" notation to access methods and data within an object
$fooVar->setX(70);
$fooVar->setY(80);
// Since z is public, we can access it directly if we wish
$fooVar->z = 90;
echo "fooVar is ", $fooVar, "<br/>";
$subFooVar = new SubFoo(22, 33, 44, 55);
echo "subFooVar is ", $subFooVar, "<br/>";
// We can access setX and setY via inheritance
$subFooVar->setX(20);
$subFooVar->setY(30);
$subFooVar->z = 40;
$subFooVar->setSub(50);
echo "subFooVar is ", $subFooVar, "<br/>";
echo "x field is " . $subFooVar->subGetX() . "<br/>";
echo "y field is " . $subFooVar->subGetY() . "<br/>";
echo "<br/>";
// "Kind of" polymorphic access. Note that we are mixing a subclass
