inheritance classes of geometric shapes

Square.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: mrs
+ * Date: 28.12.2017
+ * Time: 11:06
+ */
+
+require_once('InterfacePerimeter.php');
+require_once('AbstractArea.php');
+
+class Square extends Area implements Perimeter
+{
+    public $diagonalLength;
+    public $segmentLength;
+    public $perimeter;
+    public $area;
+
+    public function __construct(float $diagonalLength)
+    {
+        $this->diagonalLength = $diagonalLength;
+    }
+
+    public function getSegmentLength(): float
+    {
+        $this->segmentLength = ($this->diagonalLength) / sqrt(2);
+
+        return $this->getSegmentLength();
+
+    }
+
+    public function printSegmentLength(): void
+    {
+        if (empty($this->segmentLength)) {
+            $this->getSegmentLength();
+        }
+        echo "Длина стороны квадрата равна " . $this->segmentLength;
+    }
+
+    public function getArea(): float
+    {
+        $this->area = ($this->segmentLength) ** 2;
+
+        return $this->getArea();
+    }
+
+    public function printArea(): void
+    {
+        if (empty($this->area)) {
+            $this->getArea();
+        }
+        echo "Площадь квадрата равна " . $this->area;
+    }
+
+    public function getPerimeter(): float
+    {
+        $this->perimeter = 4 * ($this->segmentLength);
+
+        return $this->getPerimeter();
+    }
+
+    public function printPerimeter(): void
+    {
+        if (empty($this->perimeter)) {
+            $this->getPerimeter();
+        }
+        echo "Периметр квадрата равен " . $this->perimeter;
+    }
+}