object is not accessible after instantiation

Class person{
var $name;
function say () {
echo "hello! ";
}
}
$P = new Person;
$p->name= "TOM";
$p->say ();
?>


notice:undefined variable:p in I:\www\PHPnow-1.5.6.4237493736\Package\htdocs\DemoClass.php on line 10

Fatal Error:call to a member function say () on a non-object in I:\www\PHPnow-1.5.6.4237493736\Package\htdocs\DemoClass.ph P on line 10
Where is wrong, novice to ask, I follow the book code.

Reply to discussion (solution)

$P = new Person;
$p->say ();

PHP variables are case-sensitive
$P and $p are two variables

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