HTML-in-PHP

html-in-php.php

<?php

if (!function_exists('array_is_list')) {
    function array_is_list(array $array): bool
    {
        return array_keys($array) === range(0, count($array) - 1);
    }
}

$data = [
    [
        'description' => 'Foo',
        'price' => 1.99,
    ],
    [
        'description' => 'Bar',
        'price' => 2.88,
    ],
    [
        'description' => 'Baz',
        'price' => 3.77,
    ],
    [
        'description' => 'Bay',
        'price' => 4.66,
    ],
];

class Element implements \Stringable
{
    private array $attributes = [];

    private ?array $children = null;

    public function __construct(
        private string $name,
    ) { }

    public function __invoke(...$args): static|string
    {
        if (array_is_list($args)) {
            $this->children = $args;
            return $this->__toString();
        }
        $this->attributes = $args;
        return $this;
    }

    public function __toString(): string
    {
        $rendered = '<' . $this->name;
        foreach ($this->attributes as $attribute => $value) {
            $rendered .= ' ' . $attribute;
            if ($value !== true) {
                $rendered .= '="' . htmlentities($value) . '"';
            }
        }
        $rendered .= '>';
        if ($this->children) {
            $rendered .= implode('', $this->children) . '</' . $this->name . '>';
        }
        return $rendered;
    }
}

$elements = [
    'table',
    'th',
    'tr',
    'td',
];

foreach ($elements as $element) {
    $$element = new Element($element);
}

echo $table(id: 'table-id')(
    $tr(
        $th('Description'),
        $th(class: 'text-right')('Price'),
    ),
    ...array_map(fn(array $row) =>
        $tr(
            $td($row['description']),
            $td(number_format($row['price'], 2)),
        ),
        $data,
    ),
);