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Informations about the package html5


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HTML5 is a standards-compliant HTML5 parser and writer written entirely in PHP. It is stable and used in many production websites, and has well over five million downloads.

HTML5 provides the following features.

CI Latest Stable Version Code Coverage Scrutinizer Code Quality Stability: Sustained


Install HTML5-PHP using composer.

By adding the masterminds/html5 dependency to your composer.json file:

By invoking require command via composer executable:

Basic Usage

HTML5-PHP has a high-level API and a low-level API.

Here is how you use the high-level HTML5 library API:

The $dom created by the parser is a full DOMDocument object. And the save() and saveHTML() methods will take any DOMDocument.


It is possible to pass in an array of configuration options when loading an HTML5 document.

The following options are supported:

The Low-Level API

This library provides the following low-level APIs that you can use to create more customized HTML5 tools:

The unit tests exercise each piece of the API, and every public function is well-documented.

Parser Design

The parser is designed as follows:

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 serializer (save(), saveHTML()) follows the section 8.9 of the HTML 5.0 spec. So tags are serialized according to these rules:

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:

XML Namespaces

To use XML style namespaces you have to configure well the main HTML5 instance.

You can also add some default prefixes that will not require the namespace declaration, but its elements will be namespaced.

Thanks to...

The dedicated (and patient) contributors of patches small and large, who have already made this library better.See the CREDITS file for a list of contributors.

We owe a huge debt of gratitude to the original authors of html5lib.

While not much of the original parser remains, we learned a lot from reading the html5lib library. And some pieces remain here. In particular, much of the UTF-8 and Unicode handling is derived from the html5lib project.


This software is released under the MIT license. The original html5lib library was also released under the MIT license.


Certain files contain copyright assertions by specific individuals involved with html5lib. Those have been retained where appropriate.

All versions of html5 with dependencies

PHP Build Version
Package Version
Requires ext-dom Version *
php Version >=5.3.0
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