<form action="" method="post">
请输入|圆形|的半径：<br/>
半径：<input type="text" name="radius" > <br/>
<input type="submit" name="btn" value="计算">
</form>
</body>
</html>
<?php
include 'file_7_extraTraining.php';
class Circle extends Shape
{
private $radius;
function __construct($radius)
{
$this->radius = $radius;
}
function getArea()
{
return $this->radius * $this->radius * 3.14;
}
function getPerimeter()
{
return $this->radius * 2 * 3.14;
}
}
if (isset($_POST["btn"])) {
$circle1 = new Circle($_POST["radius"]);
echo "圆形的周长：" . $circle1->getPerimeter() . "<br/>";
echo "圆形的面积：" . $circle1->getArea() . "<br/>";
}
public function getArea()
{
echo "Liczymy obwod <br>";
$xxx = parent::getPerimeter();
echo $xxx * $this->h . "<br>";
}
<?php
// circle.php
require_once "app_autoload.php";
$circle = new Circle(7);
echo "Dimensions: " . $circle->getDimensions() . "<br>";
echo "Perimeter (circumference): " . $circle->getPerimeter() . " (" . $circle->getCircumference() . ")<br>";
echo "Area: " . $circle->getArea() . "<br>";
