Tag Service

HTML tags for PHP applications.

Table of Contents

• Getting started
  • Requirements
  • Highlights
• Documentation
  • Tag
    • Create Tag
    • Tag Factory
    • Tag Interface
  • NullTag
  • Taggable
  • Attributes
    • Create Attributes
    • Attributes Interface
  • Str
• Credits

---

Getting started

Add the latest version of the tag service project running this command.

composer require tobento/service-tag

Requirements

• PHP 8.0 or greater

Highlights

• Framework-agnostic, will work with any project
• Decoupled design

Documentation

Tag

Create Tag

use Tobento\Service\Tag\Tag;
use Tobento\Service\Tag\TagInterface;

$tag = new Tag(
    name: 'p',
    html: 'html' // Must be escaped
);

var_dump($tag instanceof TagInterface);
// bool(true)

You might adjust the default parameters.

use Tobento\Service\Tag\Tag;
use Tobento\Service\Tag\Attributes;

$tag = new Tag(
    name: 'li',
    html: 'html', // Must be escaped
    attributes: new Attributes(), // is default
    level: 2, // default is null
    renderEmptyTag: false, // default is true
);

Tag Factory

Easily create a tag with the provided tag factory:

use Tobento\Service\Tag\TagFactory;
use Tobento\Service\Tag\TagFactoryInterface;

$tagFactory = new TagFactory();

var_dump($tagFactory instanceof TagFactoryInterface);
// bool(true)

createTag

use Tobento\Service\Tag\TagFactory;
use Tobento\Service\Tag\TagInterface;
use Tobento\Service\Tag\Attributes;

$tag = (new TagFactory())->createTag(
    name: 'p',
    html: '', // is default
    attributes: new Attributes(), // is default
    level: 2, // default is null
);

var_dump($tag instanceof TagInterface);
// bool(true)

createTagFromHtml

Create a tag from the specified html.

use Tobento\Service\Tag\TagFactory;
use Tobento\Service\Tag\TagInterface;

$tag = (new TagFactory())->createTagFromHtml(html: 'html');

var_dump($tag instanceof TagInterface);
// bool(true)

Tag Interface

getters

use Tobento\Service\Tag\Tag;
use Tobento\Service\Tag\TagInterface;
use Tobento\Service\Tag\AttributesInterface;

$tag = new Tag(name: 'li', html: 'html');

var_dump($tag instanceof TagInterface);
// bool(true)

var_dump($tag->getName());
// string(2) "li"

var_dump($tag->getHtml());
// string(4) "html"

var_dump($tag->getLevel());
// NULL (or int)

var_dump($tag->attributes() instanceof AttributesInterface);
// bool(true)

with methods

The with methods will return a new instance.

use Tobento\Service\Tag\Tag;
use Tobento\Service\Tag\Attributes;

$tag = new Tag(name: 'li', html: 'html');

$tag = $tag->withName('ul');

$tag = $tag->withHtml('html');

$tag = $tag->withLevel(2);

$tag = $tag->withAttributes(new Attributes());

$tag = $tag->withAttr(name: 'data-foo', value: 'bar');

manipulation methods

use Tobento\Service\Tag\Tag;

$tag = new Tag(name: 'li', html: 'html');

$tag->prepend(html: 'foo');

var_dump($tag->getHtml());
string(7) "foohtml"

$tag->append(html: 'bar');

var_dump($tag->getHtml());
// string(10) "foohtmlbar"

attributes methods

The attr method will overwrite attributes with same names.

use Tobento\Service\Tag\Tag;

$tag = new Tag(name: 'li', html: 'html');

$tag->attr(name: 'data-foo', value: 'bar');
$tag->attr(name: 'data-foo', value: 'foo');

var_dump(htmlspecialchars((string)$tag));
// string(50) "<li data-foo="foo">html</li>"

use Tobento\Service\Tag\Tag;

$tag = new Tag(name: 'li', html: 'html');

$tag->class(value: 'bar');
$tag->class(value: 'foo');

var_dump(htmlspecialchars((string)$tag));
// string(51) "<li class="bar foo">html</li>"

render methods

use Tobento\Service\Tag\Tag;

$tag = new Tag(name: 'p', html: 'html');

<?= $tag->render() ?>

// or just
<?= $tag ?>

Sometimes, it might be useful not rendering the tag if it is empty. You may do so if you set render empty tag to false, it returns an empty string if there is no html.

use Tobento\Service\Tag\Tag;

$tag = new Tag(
    name: 'p',
    html: '',
    renderEmptyTag: false
);

var_dump($tag->render());
// string(0) ""

You may want to do the opening and closing by yourself.

use Tobento\Service\Tag\Tag;

$tag = new Tag(name: 'p', html: 'html');

var_dump(htmlspecialchars($tag->open()));
// string(9) "<p>"

if (!$tag->isSelfClosing()) {
    var_dump(htmlspecialchars($tag->close()));
    // string(10) "</p>"
}

NullTag

The NullTag::class does not render any html tag at all only its html.

use Tobento\Service\Tag\NullTag;
use Tobento\Service\Tag\TagInterface;

$tag = new NullTag(
    html: 'html', // Must be escaped
    level: 2, // default is null
);

var_dump($tag instanceof TagInterface);
// bool(true)

var_dump((string)$tag);
// string(4) "html"

Taggable

use Tobento\Service\Tag\Taggable;
use Tobento\Service\Tag\HasTag;
use Tobento\Service\Tag\Tag;
use Tobento\Service\Tag\TagInterface;

class Foo implements Taggable
{
    use HasTag;
}

$foo = new Foo();
$foo->setTag(new Tag(name: 'p'));

var_dump($foo->tag() instanceof TagInterface);
// bool(true)

Attributes

Create Attributes

use Tobento\Service\Tag\Attributes;
use Tobento\Service\Tag\AttributesInterface;

$attributes = new Attributes();

var_dump($attributes instanceof AttributesInterface);
// bool(true)

// or
$attributes = new Attributes([
    'class' => 'name',
    'data-foo' => '',
    
    // set null as value or an int key
    // as only to render the name:
    'required' => null,
    1 => 'readonly',
    
    // turns into json string:
    'data-bar' => ['key' => 'value'],
]);

var_dump((string)$attributes);
// string(90) " class="name" data-foo="" required readonly data-bar='{"key":"value"}'"

Attributes Interface

empty

use Tobento\Service\Tag\Attributes;
use Tobento\Service\Tag\AttributesInterface;

$attributes = new Attributes();

var_dump($attributes instanceof AttributesInterface);
// bool(true)

var_dump($attributes->empty());
// bool(true)

$attributes = new Attributes(['class' => 'foo']);

var_dump($attributes->empty());
// bool(false)

has

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes(['class' => 'foo']);

var_dump($attributes->has('id'));
// bool(false)

var_dump($attributes->has('class'));
// bool(true)

get

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes([
    'class' => 'foo',
    'data-foo' => ['key' => 'value'],
]);

var_dump($attributes->get(name: 'id'));
// NULL

var_dump($attributes->get('class'));
// string(3) "foo"

var_dump($attributes->get('data-foo'));
// array(1) { ["key"]=> string(5) "value" }

set

The set method does overwrite existing attributes.

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes();

$attributes->set(name: 'class', value: 'foo');

$attributes->set('class', 'bar');

var_dump((string)$attributes);
// string(12) " class="bar""

You might just set the name only for certain attributes:

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes();

$attributes->set('readonly');

var_dump((string)$attributes);
// string(9) " readonly"

add

The add method does "merge" existing attributes.

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes();

$attributes->add(name: 'class', value: 'foo');

$attributes->add('class', 'bar');

var_dump((string)$attributes);
// string(16) " class="foo bar""

$attributes = new Attributes();

$attributes->add('data-cars', ['volvo' => 'Volvo']);
$attributes->add('data-cars', ['bmw' => 'BMW']);

var_dump((string)$attributes);
// string(82) " data-cars='{"volvo":"Volvo","bmw":"BMW"}'"

merge

The merge method merges the specified attributes with the existing attributes.

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes([
    'class' => 'foo',
    'data-colors' => ['blue' => 'Blue'],
]);

$attributes->merge(attributes: [
    'class' => 'bar',
    'data-colors' => ['red' => 'Red'],
]);

var_dump((string)$attributes);
// string(98) " class="foo bar" data-colors='{"blue":"Blue","red":"Red"}'"

all

Returns all attributes.

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes([
    'class' => 'foo',
]);

var_dump($attributes->all());
// array(1) { ["class"]=> string(3) "foo" }

render

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes([
    'class' => 'foo',
]);

var_dump($attributes->render());
// string(12) " class="foo""

If there are attributes, it returns an empty space at the beginning, otherwise an empy string.

This way you can simply do the following:

<p<?= $attributes ?>>Lorem ipsum</p>

renderWithoutSpace

use Tobento\Service\Tag\Attributes;

$attributes = new Attributes([
    'class' => 'foo',
]);

var_dump($attributes->renderWithoutSpace());
// string(11) "class="foo""

Str

esc

Returns the escaped string.

use Tobento\Service\Tag\Str;

$escapedString = Str::esc(
    string: 'string', // string|Stringable
    flags: ENT_QUOTES, // default
    encoding: 'UTF-8', // default
    double_encode: true // default
);

var_dump($escapedString);
// string(6) "string"

formatTagAttributes

Returns the formatted and escaped attributes as string.

use Tobento\Service\Tag\Str;

$string = Str::formatTagAttributes(
    attributes: [
        'class' => 'bar',
        'data-colors' => ['red' => 'Red'],
    ],
    withSpace: true, // default
);

var_dump($string);
// string(60) " class="bar" data-colors='{"red":"Red"}'"

Credits

• Tobias Strub
• All Contributors