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996eaf4331
* Remove unnecessary reference assigment
Proposed code is PHP5 and PHP7 compatible. PHP5 interpreted `$e->$type[$attr]` as `$e->{$type[$attr]}`, but the expected behavior based on workaround is consistent with PHP7 interpretation: `($e->$type)[$attr]`. By using curly braces `{$e->$type}[$attr]` there is a forced interpretation order working for both versions.
Details can be found on https://www.php.net/manual/en/migration70.incompatible.php (section "Changes to the handling of indirect variables, properties, and methods")
* Fix syntax
Use correct syntax for indirect variable evaluation order change.
HTML Purifier 
HTML Purifier is an HTML filtering solution that uses a unique combination of robust whitelists and aggressive parsing to ensure that not only are XSS attacks thwarted, but the resulting HTML is standards compliant.
HTML Purifier is oriented towards richly formatted documents from untrusted sources that require CSS and a full tag-set. This library can be configured to accept a more restrictive set of tags, but it won't be as efficient as more bare-bones parsers. It will, however, do the job right, which may be more important.
Places to go:
- See INSTALL for a quick installation guide
- See docs/ for developer-oriented documentation, code examples and an in-depth installation guide.
- See WYSIWYG for information on editors like TinyMCE and FCKeditor
HTML Purifier can be found on the web at: http://htmlpurifier.org/
Installation
Package available on Composer.
If you're using Composer to manage dependencies, you can use
$ composer require ezyang/htmlpurifier