【PHP】__construct(コンストラクタ)の練習

コード

<?php
class Dog {
    private $name;
    private $weight;
    private $height;

    public function __construct($name, $weight,$height){
        $this->name = $name;
        $this->weight = $weight;
        $this->height = $height;
    }

    public function introduce(){
          $this->introduce_name();
          $this->introduce_weight();
          $this->introduce_height();
    }
    private function introduce_name(){
        echo '僕の名前は'. $this->name. 'だワン!'.PHP_EOL;
    }
    private function introduce_weight(){
        echo '僕の体重は'. $this->weight.'kgだワン!'.PHP_EOL;
        echo ($this->weight < 10 ? '小型犬だワン!' : '中型犬以上だワン!').PHP_EOL;
    }
    private function introduce_height(){
      echo '僕の体長は'. $this->height.'cmだワン!'.PHP_EOL;
    }
}
$hati = new Dog('ハチ', 9,70);
$hati->introduce();

結果

僕の名前はハチだワン!
僕の体重は9kgだワン!
小型犬だワン!
僕の体長は70cmだワン!