PHP Markdown Extension

A lightweight PHP extension of Parsedown that adds:

• Audio and video embedding using markdown syntax
• Automatic Table of Contents generation
• Responsive HTML tables
• External links automatically open in a new tab when the hostname differs

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Installation

Installation via composer.

composer require nanoblocktech/markdown

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Quick Start

use Luminova\ExtraUtils\HtmlDocuments\Markdown;

$markdown = new Markdown();

echo $markdown->text('### Hello World');

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Media Embedding

Embedding audio and videos in markdown.

Audio

{Description}(audio)(/path/to/audio.opus)

Video

{Description}(video)(/path/to/video.mp4)

Supports both local and remote URLs.

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Configuration

Enable Features

// Generate table of contents
$markdown->tableOfContents(true);

// Make HTML tables responsive
$markdown->responsiveTable(true);

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Table of Contents Options

// Include specific heading levels
$markdown->setHeadings(['h1', 'h2']);

// Prefix for generated heading IDs
$markdown->setIdPrefix('my-contents-');

// Retrieve generated table of contents
$tableOfContents = $markdown->getTableOfContents();

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Link Handling

// Base URL for relative links
$markdown->setLink('https://example.com/assets/');

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Media Types

$markdown->setMediaType('audio', 'audio/ogg; codecs=opus');
$markdown->setMediaType('video', 'video/mp4');

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Rendering Markdown

echo $markdown->text($content);

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Full Example

$markdown = new Markdown();
$markdown->tableOfContents(true);
$markdown->responsiveTable(true);
$markdown->setHeadings(['h1', 'h2']);
$markdown->setIdPrefix('toc-');
$markdown->setLink('https://example.com/assets/');
$markdown->setMediaType('audio', 'audio/ogg; codecs=opus');
$markdown->setMediaType('video', 'video/mp4');

$mdText = <<<MD
# Welcome
Some intro text.

## Audio Example
{Cool song}(audio)(/media/song.opus)

## Video Example
{Demo video}(video)(/media/demo.mp4)
MD;

echo $markdown->text($mdText);

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Features vs Parsedown

Feature	Parsedown	PHP Markdown Extension
Markdown rendering	✅	✅
Audio embedding	❌	✅
Video embedding	❌	✅
Table of Contents generation	❌	✅
Responsive HTML tables	❌	✅
Auto external link target="_blank"	❌	✅

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Notes:

• External links automatically receive target="_blank" when the host differs from your application domain.
• Media embedding works with local paths or remote URLs.
• Table of contents is generated from configured heading levels only.