some exercises and christmass mystery

Koterov-php-training/methods_of_classes/greeting.php

@@ -0,0 +1,8 @@
+<?php
+class Greeting
+{
+    public function say(string $who): string
+    {
+        return "Hello, $who!";
+    }
+}

Koterov-php-training/methods_of_classes/index.php

@@ -0,0 +1,56 @@
+<?php
+require_once 'greeting.php';
+
+$object = new Greeting;
+echo $object->say('PHP');
+echo "</br></br>";
+
+
+require_once 'point.php';
+
+$point = new Point(3, 5);
+// $point->__construct();
+// $point->inner();
+echo "</br>";
+var_dump( $point->getX());
+echo "</br>";
+var_dump( $point->getY());
+echo "</br></br>";
+
+// $point->setX(5);
+// $point->setY(7);
+
+var_dump( $point->getX());
+echo "</br>";
+var_dump( $point->getY());
+echo "</br></br>";
+
+echo $point->distance();
+
+echo '<pre>';
+print_r($point);
+echo '</pre>';
+
+// echo $point->x;
+// echo '</br>';
+
+echo '<pre>';
+print_r(get_class_methods($point));
+echo '</pre>';
+
+if (method_exists($point,'say')) {
+    echo $point->say('PHP');
+}
+
+$greeting = new Greeting;
+
+$greeting->x = 5;
+if (method_exists($greeting,'x')) {
+echo $greeting->x;
+}
+
+$point->z = 5;
+
+echo '<pre>';
+print_r($point->listVariables());
+echo '</pre>';

Koterov-php-training/methods_of_classes/point.php

@@ -0,0 +1,46 @@
+<?php
+class Point
+{
+    // private $x;
+    // private $y;
+
+    public function __construct(private int $x = 0, private int $y = 0)
+    {
+        echo 'Вызов конструктора <br />';
+        $this->x = $x;
+        $this->y = $y;
+    }
+
+    public function inner()
+    {
+        $this->__construct();
+    }
+
+    // public function setX(int $x): void
+    // {
+    //     $this->x = $x;
+    // }
+    // public function setY(int $y): void
+    // {
+    //     $this->y = $y;
+    // }
+    public function getX(): int
+    {
+        return $this->x;
+    }
+    public function getY(): int
+    {
+        return $this->y;
+    }
+    public function distance(): float
+    {
+        return sqrt($this->getX() ** 2 + $this->getY() ** 2);
+    }
+
+    public function listVariables(): array
+    {
+        return get_object_vars($this);
+    }
+
+
+}

cristmass-tree/index.php

@@ -0,0 +1,6 @@
+<?php
+
+include_once ('tree.php');
+
+$cristmassTree = new Tree(15);
+$cristmassTree->drawTree();

cristmass-tree/tree.php

@@ -0,0 +1,25 @@
+<?php
+
+class Tree
+{
+    public $height;
+
+
+    public function __construct(int $height)
+    {
+        if ($height <= 3) {
+            throw new InvalidArgumentException("Your christmas tree is too small, try again!");
+        }
+        $this->height = $height;
+    }
+
+    public function drawTree(): void
+    {
+        $width = 2 * $this->height - 1;
+        for ($i = 1; $i <= $this->height; $i++) {
+            $stars = 2 * $i - 1;
+            $spaces = ($width - $stars);
+            echo str_repeat("&nbsp;", $spaces) . str_repeat("*", $stars) . "</br>";
+        }
+    }
+}