fastvolt/markdown

A Fast, Simple and Straight-forward Markdown to HTML Converter for PHP.

v0.2.3 2025-06-11 20:44 UTC

Requires

• php: ^8.1
• amphp/file: ^3.0

Requires (Dev)

• friendsofphp/php-cs-fixer: ^3.38
• phpunit/phpunit: ^10.4

MIT

• Oladoyinbo Vincent

• markdown
• markdown-to-html
• markdown-parser
• markdown-library

README

Markdown Parser for PHP

A fast, simple, and straightforward Markdown to HTML converter for PHP.

🚀 Installation

composer require fastvolt/markdown

📦 Basic Usage

use FastVolt\Helper\Markdown;

$text = "## Hello, World";

// initialize markdown object
$markdown = Markdown::new();

// set markdown content 
$markdown->setContent($text);

// compile as raw HTML
echo $markdown->toHtml();

Output:

<h2>Hello, World</h2>

📄 Convert Markdown File to Raw HTML

sample.md:

#### Heading 4
### Heading 3
## Heading 2
# Heading 1

- List 1
- List 2

> THIS IS A BLOCKQUOTE

[A LINK](https://github.com/fastvolt)

index.php:

$markdown = Markdown::new();

// set markdown file to parse 
$markdown->setFile('./sample.md');

// compile as raw HTML
echo $markdown->toHtml();

Output:

<h4>Heading 4</h4>
<h3>Heading 3</h3>
<h2>Heading 2</h2>
<h1>Heading 1</h1>
<ul>
  <li>List 1</li>
  <li>List 2</li>
</ul>
<blockquote><p>THIS IS A BLOCKQUOTE</p></blockquote>
<a href="https://github.com/fastvolt">A LINK</a>

📝 Compile Markdown to HTML File

blogPost.md:

Here is a Markdown File Waiting To Be Compiled To an HTML File

index.php:

$markdown = Markdown::new()
    // set markdown file
    ->setFile(__DIR__ . '/blogPost.md')
    // set compilation directory 
    ->setCompileDir(__DIR__ . '/pages/')
    // compile as an html file named 'newHTMLFile.html'
    ->toHtmlFile(filename: 'newHTMLFile');

if ($markdown) {
  echo "Compiled to ./pages/newHTMLFile.html";
}

🔒 Sanitizing HTML Output (XSS Protection)

You can sanitize input HTML and prevent cross-site scripting (XSS) attack using the sanitize flag:

$markdown = Markdown::new(
   sanitize: true
);

$markdown->setContent('<h1>Hello World</h1>');

echo $markdown->toHtml();

Output:

<p>&lt;h1&gt;Hello World&lt;/h1&gt;</p>

⚙️ Advanced Use Case

Inline Markdown

$markdown = Markdown::new();

$markdown->setInlineContent('_My name is **vincent**, the co-author of this blog_');

echo $markdown->ToHtml();

Output:

<i>My name is <strong>vincent</strong>, the co-author of this blog</i>

NOTE: Some markdown symbols are not supported with this method

Example #1

Combine multiple markdown files, contents and compile them in multiple directories:

Header.md

# Blog Title  
### Here is the Blog Sub-title

Footer.md

### Thanks for Visiting My BlogPage

index.php

$markdown = Markdown::new(sanitize: true)
    // include header file's markdown contents
    ->setFile('./Header.md')
    // body contents
    ->setInlineContent('_My name is **vincent**, the co-author of this blog_')
    ->setContent('Kindly follow me on my GitHub page via: [@vincent](https://github.com/oladoyinbov).')
    ->setContent('Here are the lists of my projects:')
    ->setContent('
- Dragon CMS
- Fastvolt Framework.
  + Fastvolt Router
  + Markdown Parser.
    ')
    // include footer file's markdown contents
    ->setFile('./Footer.md')
    // set compilation directory 
    ->setCompileDir('./pages/')
    // set another compilation directory to backup the result
    ->setCompileDir('./backup/pages/')
    // compile and store as 'homepage.html'
    ->toHtmlFile(file_name: 'homepage');

if ($markdown) {
   echo "Compile Successful";
}

Output: pages/homepage.html, backup/pages/homepage.html

<h1>Blog Title</h1>
<h3>Here is the Blog Sub-title</h3>
<i>My name is <strong>vincent</strong>, the co-author of this blog</i>
<p>Kindly follow me on my github page via: <a href="https://github.com/oladoyinbov">@vincent</a>.</p>
<p>Here are the lists of my projects:</p>
<ul>
  <li>Dragon CMS</li>
  <li>Fastvolt Framework.
    <ul>
      <li>Fastvolt Router</li>
      <li>Markdown Parser.</li>
    </ul>
  </li>
</ul>
<h3>Thanks for Visiting My BlogPage</h3>

Supported Formatting Symbols

Markdown Syntax	Description	Example Syntax	Rendered Output
# to ######	Headings (H1–H6)	## Heading 2	Heading 2
**text** or __text__	Bold	**bold**	bold
*text* or _text_	Italic	*italic*	italic
~~text~~	Strikethrough	~~strike~~	strike
`code`	Inline code	`echo`	echo
<br>code block<br>	Code block	```php\n echo "Hi"; \n```	<pre><code>...</code></pre>
-, +, or *	Unordered list	- Item 1 * Item 2	<ul><li>Item</li></ul>
1. 2.	Ordered list	1. Item 2. Item	<ol><li>Item</li></ol>
[text](url)	Hyperlink	[GitHub](https://github.com)	GitHub
> blockquote	Blockquote	> This is a quote	This is a quote
---, ***, ___	Horizontal Rule	---	<hr>
	Image		<img src="logo.png" alt="Logo">
\	Escape special character	\*not italic\*	not italic (as text)

✅ Requirements

PHP 8.1 or newer.

ℹ️ Notes

This library is an extended and simplified version of the excellent Parsedown by Erusev.

📄 License

This project is open-source and licensed under the MIT License by @fastvolt.