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Talk about safe mode in the README

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Aidan Woods 2018-02-28 17:01:31 +00:00
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README.md
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@ -38,7 +38,20 @@ More examples in [the wiki](https://github.com/erusev/parsedown/wiki/) and in [t
### Security
Parsedown does not sanitize the HTML that it generates. When you deal with untrusted content (ex: user comments) you should also use a HTML sanitizer like [HTML Purifier](http://htmlpurifier.org/).
Parsedown is capable of escaping user-input within the HTML that it generates.
Additionally Parsedown can attempt to sanitize additional scriping vectors (such
as scripting link destinations). To tell Parsedown that it is processing untrusted
user input, use the following:
```php
$parsedown = new Parsedown;
$parsedown->setSafeMode(true);
```
It is recommended that when you deal with untrusted content (ex: user comments)
you should employ defense-in-depth measures, like making use of a HTML sanitizer
that allows HTML tags to be whitelisted, like [HTML Purifier](http://htmlpurifier.org/).
Additionally, you should strongly consider
[deploying a Content-Secuity-Policy](https://scotthelme.co.uk/content-security-policy-an-introduction/).
### Questions