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hgraca/Point.php

Last active Jul 6, 2020
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A Point Value Object
<?php
final class Point
{
private int $x;
private int $y;
public function __construct(int $x, int $y)
{
$this->x = $x;
$this->y = $y;
}
public function add(self $point): self
{
return new Point($this->x + $point->x, $this->y + $point->y);
}
public function equals(self $point): bool
{
return ($this->x === $point->x) && ($this->y === $point->y);
}
public function __toString(): string
{
return "({$this->x}, {$this->y})";
}
}
$p1 = new Point(1,1);
$p2 = new Point(1,-3);
$p3 = new Point(1,1);
$p4 = $p1->add($p2);
echo $p4 . "\n"; // (2, -2)
echo ($p1->equals($p4) ? 'equal' : 'different') . "\n"; // different
echo ($p1->equals($p2) ? 'equal' : 'different') . "\n"; // different
echo ($p1->equals($p3) ? 'equal' : 'different') . "\n"; // equal
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