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This is a test of the HTML5 parser.
HERE; // Parse the document. $dom is a DOMDocument. $html5 = new HTML5(); $dom = $html5->loadHTML($html); // Render it as HTML5: print $html5->saveHTML($dom); // Or save it to a file: $html5->save($dom, 'out.html'); ``` The `$dom` created by the parser is a full `DOMDocument` object. And the `save()` and `saveHTML()` methods will take any DOMDocument. ### Options It is possible to pass in an array of configuration options when loading an HTML5 document. ```php // An associative array of options $options = array( 'option_name' => 'option_value', ); // Provide the options to the constructor $html5 = new HTML5($options); $dom = $html5->loadHTML($html); ``` The following options are supported: * `encode_entities` (boolean): Indicates that the serializer should aggressively encode characters as entities. Without this, it only encodes the bare minimum. * `disable_html_ns` (boolean): Prevents the parser from automatically assigning the HTML5 namespace to the DOM document. This is for non-namespace aware DOM tools. * `target_document` (\DOMDocument): A DOM document that will be used as the destination for the parsed nodes. * `implicit_namespaces` (array): An assoc array of namespaces that should be used by the parser. Name is tag prefix, value is NS URI. ## The Low-Level API This library provides the following low-level APIs that you can use to create more customized HTML5 tools: - A SAX-like event-based parser that you can hook into for special kinds of parsing. - A flexible error-reporting mechanism that can be tuned to document syntax checking. - A DOM implementation that uses PHP's built-in DOM library. The unit tests exercise each piece of the API, and every public function is well-documented. ### Parser Design The parser is designed as follows: - The `Scanner` handles scanning on behalf of the parser. - The `Tokenizer` requests data off of the scanner, parses it, clasifies it, and sends it to an `EventHandler`. It is a *recursive descent parser.* - The `EventHandler` receives notifications and data for each specific semantic event that occurs during tokenization. - The `DOMBuilder` is an `EventHandler` that listens for tokenizing events and builds a document tree (`DOMDocument`) based on the events. ### Serializer Design The serializer takes a data structure (the `DOMDocument`) and transforms it into a character representation -- an HTML5 document. The serializer is broken into three parts: - The `OutputRules` contain the rules to turn DOM elements into strings. The rules are an implementation of the interface `RulesInterface` allowing for different rule sets to be used. - The `Traverser`, which is a special-purpose tree walker. It visits each node node in the tree and uses the `OutputRules` to transform the node into a string. - `HTML5` manages the `Traverser` and stores the resultant data in the correct place. The serializer (`save()`, `saveHTML()`) follows the [section 8.9 of the HTML 5.0 spec](http://www.w3.org/TR/2012/CR-html5-20121217/syntax.html#serializing-html-fragments). So tags are serialized according to these rules: - A tag with children: <foo>CHILDREN</foo> - A tag that cannot have content: <foo> (no closing tag) - A tag that could have content, but doesn't: <foo></foo> ## Known Issues (Or, Things We Designed Against the Spec) Please check the issue queue for a full list, but the following are issues known issues that are not presently on the roadmap: - Namespaces: HTML5 only [supports a selected list of namespaces](http://www.w3.org/TR/html5/infrastructure.html#namespaces) and they do not operate in the same way as XML namespaces. A `:` has no special meaning. By default the parser does not support XML style namespaces via `:`; to enable the XML namespaces see the [XML Namespaces section](#xml-namespaces) - Scripts: This parser does not contain a JavaScript or a CSS interpreter. While one may be supplied, not all features will be supported. - Reentrance: The current parser is not re-entrant. (Thus you can't pause the parser to modify the HTML string mid-parse.) - Validation: The current tree builder is **not** a validating parser. While it will correct some HTML, it does not check that the HTML conforms to the standard. (Should you wish, you can build a validating parser by extending DOMTree or building your own EventHandler implementation.) * There is limited support for insertion modes. * Some autocorrection is done automatically. * Per the spec, many legacy tags are admitted and correctly handled, even though they are technically not part of HTML5. - Attribute names and values: Due to the implementation details of the PHP implementation of DOM, attribute names that do not follow the XML 1.0 standard are not inserted into the DOM. (Effectively, they are ignored.) If you've got a clever fix for this, jump in! - Processor Instructions: The HTML5 spec does not allow processor instructions. We do. Since this is a server-side library, we think this is useful. And that means, dear reader, that in some cases you can parse the HTML from a mixed PHP/HTML document. This, however, is an incidental feature, not a core feature. - HTML manifests: Unsupported. - PLAINTEXT: Unsupported. - Adoption Agency Algorithm: Not yet implemented. (8.2.5.4.7) ## XML Namespaces To use XML style namespaces you have to configure well the main `HTML5` instance. ```php use Masterminds\HTML5; $html = new HTML5(array( "xmlNamespaces" => true )); $dom = $html->loadHTML('