castopod/app/Views/Components/Icon.php

<?php

declare(strict_types=1);

namespace App\Views\Components;

use Exception;
use ViewComponents\Component;

class Icon extends Component
{
    public string $glyph = '';

    public function render(): string
    {
        try {
            $svgContents = file_get_contents('assets/icons/' . $this->glyph . '.svg');
        } catch (Exception) {
            return '□';
        }

        unset($this->attributes['glyph']);
        $attributes = stringify_attributes($this->attributes);

        return str_replace('<svg', '<svg ' . $attributes, $svgContents);
    }
}