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# svg-sanitizer

[![Build Status](https://travis-ci.org/darylldoyle/svg-sanitizer.svg?branch=master)](https://travis-ci.org/darylldoyle/svg-sanitizer) [![Test Coverage](https://codeclimate.com/github/darylldoyle/svg-sanitizer/badges/coverage.svg)](https://codeclimate.com/github/darylldoyle/svg-sanitizer/coverage)

This is my attempt at building a decent SVG sanitizer in PHP. The work is laregely borrowed from [DOMPurify](https://github.com/cure53/DOMPurify).

## Installation

Either require `enshrined/svg-sanitize` through composer or download the repo and include the old way!

## Usage

Using this is fairly easy. Create a new instance of `enshrined\svgSanitize\Sanitizer` and then call the `sanitize` whilst passing in your dirty SVG/XML

**Basic Example**

```php
use enshrined\svgSanitize\Sanitizer;

// Create a new sanitizer instance
$sanitizer = new Sanitizer();

// Load the dirty svg
$dirtySVG = file_get_contents('filthy.svg');

// Pass it to the sanitizer and get it back clean
$cleanSVG = $sanitizer->sanitize($dirtySVG);

// Now do what you want with your clean SVG/XML data

```

## Output

This will either return a sanitized SVG/XML string or boolean `false` if XML parsing failed (usually due to a badly formatted file).

## Options

You may pass your own whitelist of tags and attributes by using the `Sanitizer::setAllowedTags` and `Sanitizer::setAllowedAttrs` methods respectively.

These methods require that you implement the `enshrined\svgSanitize\data\TagInterface` or `enshrined\svgSanitize\data\AttributeInterface`.

## Remove remote references

You have the option to remove attributes that reference remote files, this will stop HTTP leaks but will add an overhead to the sanitizer.

This defaults to false, set to true to remove references.

`$sanitizer->removeRemoteReferences(true);`

## Viewing Sanitization Issues

You may use the `getXmlIssues()` method to return an array of issues that occurred during sanitization.

This may be useful for logging or providing feedback to the user on why an SVG was refused.

`$issues = $sanitizer->getXmlIssues();`

## Minification

You can minify the XML output by calling `$sanitizer->minify(true);`.

## Demo
There is a demo available at: [http://svg.enshrined.co.uk/](http://svg.enshrined.co.uk/)

## WordPress

I've just released a WordPress plugin containing this code so you can sanitize your WordPress uploads. It's available from the WordPress plugin directory: [https://wordpress.org/plugins/safe-svg/](https://wordpress.org/plugins/safe-svg/)

## Drupal

[Michael Potter](https://github.com/heyMP) has kindly created a Drupal module for this library which is available at: [https://www.drupal.org/project/svg_sanitizer](https://www.drupal.org/project/svg_sanitizer)

## TYPO3

An integration for TYPO3 CMS of this library is available as composer package `t3g/svg-sanitizer` at [https://github.com/TYPO3GmbH/svg_sanitizer](https://github.com/TYPO3GmbH/svg_sanitizer)

## Tests

You can run these by running `vendor/bin/phpunit` from the base directory of this package.

## Standalone scanning of files via CLI

Thanks to the work by [gudmdharalds](https://github.com/gudmdharalds) there's now a standalone scanner that can be used via the CLI.

Any errors will be output in JSON format. See [the PR](https://github.com/darylldoyle/svg-sanitizer/pull/25) for an example.

Use it as follows: `php svg-scanner.php ~/svgs/myfile.svg`

## To-Do

More extensive testing for the SVGs/XML would be lovely, I'll try and add these soon. If you feel like doing it for me, please do and make a PR!