function FrontMatter::__construct

FrontMatter constructor.

Parameters

string $source: A string source.

string $serializer: A class that implements \Drupal\Component\Serialization\SerializationInterface.

File

core/modules/help_topics/src/FrontMatter.php, line 58

Class

FrontMatter

Extracts Front Matter from the beginning of a source.

Namespace

Code

public function __construct($source, $serializer = '\\Drupal\\Component\\Serialization\\Yaml') {
    assert(is_string($source), '$source must be a string');
    assert(is_string($serializer), '$serializer must be a string');
    if (!is_subclass_of($serializer, '\\Drupal\\Component\\Serialization\\SerializationInterface')) {
        throw new \InvalidArgumentException('The $serializer parameter must reference a class that implements \\Drupal\\Component\\Serialization\\SerializationInterface.');
    }
    $this->serializer = $serializer;
    $this->source = $source;
}