The WordPress WP-Super-Cache cache plugin doesn’t minify HTML cache files, which I find a disadvantage. Knowing minify libraries, I went looking for an existing solution (why reinvent the wheel?), and found one: WPSCMin. Read on …
Why the need to minify HTML cache files?
Minifying cache files is important in my opinion, because smaller minified files are downloaded faster. And minifying is what WPSCmin does.
JSMinPlus.php file, causing PHP errors. I found the mattheu/MinQueue WordPress Plugin does ship with a minify library containing JSMinPlus.php. It is in the
PHP-Minify-Lib directory, and I chose to try that one instead.
WPSCMin PHP code change
Since WPSCMin relies on mrclay/minify PHP library, you need to make a small code change if you use MinQueue’s PHP-Minify-Lib directory. In the file
wp-content/plugins/wp-super-cache/plugins/WPSCMin.php, replace all occurances of
or simply rename the PHP-Minify-Lib directory.
Update on mrclay/minify & WPSCMin
Joel of WPSCMin replied to my email (thanks!), and pointed me on the mrclay/minify releases: https://github.com/mrclay/minify/releases. The most recent release, which was in October 2014, still ships the required
JSMinPlus.php file. So, when adding WPSCMin as a plugin to WP-Super-Cache, be sure to check out the minify-releases, and not only the raw GitHub head as I did.