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[](https://travis-ci.org/cssjanus/php-cssjanus) [](https://packagist.org/packages/cssjanus/cssjanus)
# CSSJanus
Convert CSS stylesheets between left-to-right and right-to-left.
## Basic usage
```php
$rtlCss = CSSJanus::transform( $ltrCss );
```
## Advanced usage
``transform( $css, $swapLtrRtlInURL = false, $swapLeftRightInURL = false )``
* ``$css`` (string) Stylesheet to transform
* ``$swapLtrRtlInURL`` (boolean) Swap 'ltr' and 'rtl' in URLs
* ``$swapLeftRightInURL`` (boolean) Swap 'left' and 'right' in URLs
### Preventing flipping
Use a ```/* @noflip */``` comment to protect a rule from being changed.
```css
.rule1 {
/* Will be converted to margin-right */
margin-left: 1em;
}
/* @noflip */
.rule2 {
/* Will be preserved as margin-left */
margin-left: 1em;
}
```
## Port
This is a PHP port of the Node.js implementation of CSSJanus.
Feature requests and bugs related to the actual CSS transformation or test
cases of it, should be submitted upstream at
<https://github.com/cssjanus/cssjanus>.
Upstream releases will be ported here.
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