com.ceilidhkit/App/TwigExtensions/StringManipulationExtension.php

<?php

namespace App\TwigExtensions;

use Twig\Extension\AbstractExtension;
use Twig\TwigFunction;

class StringManipulationExtension extends AbstractExtension
{
    public function getFunctions()
    {
        return [
            new TwigFunction('turn_mot_code_to_url', [$this, 'TurnMOTCodeToURL']),
        ];
    }


    public function TurnMOTCodeToURL(string $motCode) : string
    {
        $groups = [
            7=>"7-other-equipment"
        ];

        $motCodeElements = explode(separator: '.', string: $motCode);

        $builder = "https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles/";
        $builder .= $groups[intval(value: $motCodeElements[0])];
        $builder .= "#section-";
        $builder .= "-";
        $builder .= $motCodeElements[1];
        $builder .= "-";
        $builder .= $motCodeElements[2];

        return $builder;
    }
}