symfony-console-rgb.php

<?php

// This code was originally posted in a comment of this blog post:
// https://symfony.com/blog/new-in-symfony-5-2-true-colors-in-the-console

final class Rgb
{
    private $red;
    private $green;
    private $blue;

    public function __construct(int $red, int $green, int $blue)
    {
        $this->red = pack('C', $red);
        $this->green = pack('C', $green);
        $this->blue = pack('C', $blue);
    }

    public function toHex(): string
    {
        return sprintf('#%s%s%s', bin2hex($this->red), bin2hex($this->green), bin2hex($this->blue));
    }

    public static function fromFormat(string $rgb): self
    {
        if (!preg_match('#rgb\((?P<red>\d{1,3})\s*\,\s*(?P<green>\d{1,3})\s*\,\s*(?P<blue>\d{1,3})\s*\)#', $rgb, $matches)) {
            throw new \BadMethodCallException('RGB example: rgb(0, 255, 100)');
        }

        return new self($matches['red'], $matches['green'], $matches['blue']);
    }
}

$sensioColor = new Color('#000', '#fff');

$rgb = new Rgb(130, 232, 63);
$labsColor = new Color($rgb->toHex(), '#fff');
echo $sensioColor->apply('Sensio'), $labsColor->apply('Labs'), PHP_EOL;

$labsColor = new Color(Rgb::fromFormat('rgb(130,232,  63)')->toHex(), '#fff');
echo $sensioColor->apply('Sensio'), $labsColor->apply('Labs'), PHP_EOL;