【php】classクラスによるオブジェクト作成

<?php
class Human{
    public $myName;
    public $mySex;
    public $myHight;
    public $myWeight;
    public $myBMI;
    public function __construct($name,$sex,$height,$weight,){
        $this->myName = $name;
        $this->mySex = $sex;
        $this->myHeight = $height;
        $this->myWeight = $weight;
    }
    
    public function BMI(){
        $myBMI = $this->myWeight / (($this->myHeight/100)^2);
        return $myBMI;
    }
    

    public function data(){
        echo "名前：".$this->myName."\n性別：".$this->mySex."\n身長："
　　　　　　　.$this->myHeight."cm\n体重：".$this->myWeight."kg\nBMI："
　　　　　　　.$this->BMI();
    }
}

$human[] = new Human("太郎","男",170,65);
$human[] = new Human("次郎","男",165,60);
$human[] = new Human("花子","女",155,50);

foreach($human as $individual){
    $individual -> data();
    echo "\n\n";
}
?>