This script compiles SCSS files and then stores the resulting CSS in disk and browser caches for maximum performance. It allows you to use SASS & SCSS files in your PHP application without a noticeable performance penalty.

Installation

1. Install Composer in your site's document root. From the command line, you can do this with curl -sS https://getcomposer.org/installer | php, or see the instructions on the Composer website.

2. Copy composer.json, scss.php and .htaccess to that same directory.

3. Run, again from that same directory, php composer.phar install

4. Done! You can now include your SCSS files as follows:

    <link rel='stylesheet' href='<your stylesheet>.scss' />

Alternate installation

1. Download PHPSASS, and install it in your site root in a directory called 'vendor/richthegeek/phpsass/', in such a way that 'vendor/richthegeek/phpsass/SassParser.php' exists.

2. Copy the scss.php and .htaccess files to your site root

3. Done! You can now include your SCSS files as follows:

    <link rel='stylesheet' href='<your stylesheet>.scss' />

This script will compile the SCSS file once, and then cache the resulting output to disk. If the underlying SCSS file changes, the cached disk copy is invalidated and a new version is compiled.

Any compiled SCSS file that has been delivered to the user will be cached for 30 days, or until the next time you change your SCSS file -- whichever comes first. The stylesheet is served only once for each user. However, the user will get a new version of your stylesheet immediately if you edit one of the underlying SCSS files, or if you change one of the options that are fed to the PHPSASS parser.

For performance reasons, this script will only look at the 'file modified' times of the requested SCSS file itself, and of all the SCSS files that you '@import' from that file (only works in PHP5.3 and later), to determine if it needs to compile the SCSS, or if it just needs to serve a previously compiled version. If you make a change to a file that is imported from an imported file, then this script will not detect that change. In such cases, make sure to change the 'file modified' time of the root file (e.g. by adding and removing a space and then re-saving the file). That, or switch off caching during development (set 'ENABLE_CACHING' to FALSE).

If (for whatever reason) you want to force a recompile of the SCSS code and throwout everything that's been cached server-side, you can call this script with an additional '?reset=1', '?force=1' or '?clear=1', for example like in http://example.com/example.scss?reset=1