Configurable DocBlock parser from PHP.

Annotations aren't implemented in PHP itself which is why this component offers a way to use the PHP doc-blocks as a place for the well known tag syntax using the @ char.

The PHPDoc parser allows you to configure tags including the method how to parse and extract information. This is inline with phpDocumentor style annotations and differs from for instance Doctrine type annotations.

composer require jasny/phpdoc-parser

/**
 * The description of foo. This function does a lot of thing
 *   which are described here.
 *
 * Some more text here.
 *
 * @important
 * @uses FooReader
 * @internal Why this isn't part of the API.
 *   Multi-line is supported.
 *
 * @param string|callable $first   This is the first param
 * @param int             $second  The second one
 * @return void
 * @throws InvalidArgumentException
 * @throws DoaminException if first argument is not found
 */
function foo($first, int $second)
{
   // ...
}

Parse annotations

use Jasny\PHPDocParser\PHPDocParser;
use Jasny\PHPDocParser\Set\PhpDocumentor;
use Jasny\PHPDocParser\Tag\FlagTag;

$doc = (new ReflectionFunction('foo'))->getDocComment();

$customTags = [
    new FlagTag('important')
];
$tags = PhpDocumentor::tags()->with($customTags);

$parser = new PHPDocParser($tags);
$meta = $parser->parse($doc);

The result will be the following:

[
    'summery' => "The description of foo",
    'description' => "The description of foo. This function does a lot of thing which are described here.\n\nSome more text.",
    'important' => true,
    'uses' => 'FooReader',
    'internal' => "Why this isn't part of the API. Mutlti-line is supported",
    'params' => [
        'first' => [
            'type' => "string|callable",
            'name' => "first",
            'description' => "This is the first parm"
        ],
        'second' => [
            'type' => "int",
            'name' => "second",
        ]
    ],
    'return' => 'void'
]

The following tags are already included in PhpDocumentor::tags():

• @api
• @author
• @copyright
• @deprecated
• @example
• @ignore
• @internal
• @link
• @method (all methods will be grouped in methods array)
• @package
• @param (all params will be grouped in params array)
• @property (all properties will be grouped in properties array)
• @property-read (also in properties array)
• @property-write (also in properties array)
• @return
• @see
• @since
• @throws (all exceptions will be grouped in throws array)
• @todo
• @uses
• @used-by
• @var

So if you only need to parse those tags, you can simply do:

//$doc = ...; Get doc-comment string from reflection

$tags = PhpDocumentor::tags();
$parser = new PhpdocParser($tags);
$meta = $parser->parse($doc);

Here's a list of available tags classes, that should cover most of the use cases:

• Summery
• ArrayTag
• CustomTag
• DescriptionTag
• ExampleTag
• FlagTag
• MapTag
• MethodTag
• ModifyTag
• MultiTag
• NumberTag
• RegExpTag
• VarTag
• WordTag

The following function is used in tags documentation, for short reference to parsing:

function getNotations(string $doc, array $tags = []) {
    $tags = PhpDocumentor::tags()->add($tags);

    $parser = new PhpdocParser($tags);
    $notations = $parser->parse($doc);

    return $notations;
}

FQSEN stands for Fully Qualified Structural Element Name. FQSEN convertor is used to expand class name or function name to fully unique name (so with full namespace). For example, Foo can be converted to Zoo\\Foo\\Bar.

Such convertors are used in this lib. Some tags, that deal with variable types, or classes names, support adding them as a constructor parameter.

For example, TypeTag, that can be used for parsing @return tag, has the following constructor: TypeTag($name, $fqsenConvertor = null). If provided, convertor expands the type, given as type of returned value in doc-comment. If ommited, the type will stay as it is in doc-comment.

Convertor can be provided in one of two ways:

• $tags = PhpDocumentor::tags($fn) - for all the tags, predefined in PhpDocumentor::tags()
• $tags = $tags->add(new TypeTag('footag', $fn)) - for all the tags, that are explicitly added to predefined, it should be passed as a constructor parameter (if it is supported by constructor).

After that create the parser from the tags as $parser = new PhpdocParser($tags).

The resolver function should accept a class name and return an expanded name.

This example uses phpDocumentor/TypeResolver.

$reflection = new ReflectionClass('\My\Example\Classy');

$contextFactory = new \phpDocumentor\Reflection\Types\ContextFactory();
$context = $contextFactory->createFromReflector($reflection);

$resolver = new \phpDocumentor\Reflection\FqsenResolver();
$fn = fn(string $class): string => $resolver->resolve($class, $context);

$tags = PhpDocumentor::tags($fn);
$parser = new PhpdocParser($tags);

$doc = $reflection->getDocComment();
$meta = $parser->parse($doc);