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---
layout: default
title: Smart Punctuation Extension
description: The SmartPunctExtension intelligently converts ASCII quotes, dashes, and ellipses to their Unicode equivalents
---
# Smart Punctuation Extension
The `SmartPunctExtension` Intelligently converts ASCII quotes, dashes, and ellipses to their Unicode equivalents.
For example, this Markdown...
```markdown
"CommonMark is the PHP League's Markdown parser," she said. "It's super-configurable... you can even use additional extensions to expand its capabilities -- just like this one!"
```
Will result in this HTML:
```html
<p>“CommonMark is the PHP League’s Markdown parser,” she said. “It’s super-configurable… you can even use additional extensions to expand its capabilities – just like this one!”</p>
```
## Installation
This extension is bundled with `league/commonmark`. This library can be installed via Composer:
```bash
composer require league/commonmark
```
See the [installation](/2.1/installation/) section for more details.
## Usage
Extensions can be added to any new `Environment`:
```php
use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
use League\CommonMark\Extension\SmartPunct\SmartPunctExtension;
use League\CommonMark\MarkdownConverter;
// Define your configuration, if needed
$config = [
'smartpunct' => [
'double_quote_opener' => '“',
'double_quote_closer' => '”',
'single_quote_opener' => '‘',
'single_quote_closer' => '’',
],
];
// Configure the Environment with all the CommonMark parsers/renderers
$environment = new Environment($config);
$environment->addExtension(new CommonMarkCoreExtension());
// Add this extension
$environment->addExtension(new SmartPunctExtension());
// Instantiate the converter engine and start converting some Markdown!
$converter = new MarkdownConverter($environment);
echo $converter->convertToHtml('# Hello World!');
```
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