class Square

<?php
class Square {
    public $width;
    public $height;

    function __construct($width, $height) {
        $this->width = $width;
        $this->height = $height;
    }

    function area(){
        $area = $this->width * $this->height;
        return $area;
    }

    function get_width() {
        return $this->width;
    }
    function get_height() {
        return $this->height;
    }

    function setWidth($width){
        $this->width = $width;
    }

    function setHeight($height){
        $this->height = $height;
    }
}

$square1 = new Square(7, 8);
echo $square1->area();
?>