Class Php

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    class DogTag {
            public $Words;
    }
    class Dog {
            public $Name;
            public $DogTag;
            public function bark( ) {
                    print "Woof!\n";
            }
            public function _ _construct($DogName) {
                    print "Dog: $DogName\n";
                    $this->Name = $DogName;
                    $this->DogTag = new DogTag;
                    $this->DogTag->Words = "$DogName:555-1234";
            }
    }
    class Poodle extends Dog {
            public function bark( ) {
                    print "Yip!\n";
            }
    }
    $poppy = new Poodle("Poppy");
    print $poppy->DogTag->Words . "\n";
    
    function namechange($dog) {
            $dog->Name = 'Dozer';
    }
    namechange($poppy);
    print $poppy->Name . "\n";
    namechange(clone $poppy);
?>