Compress multiple CSS files
If you’re using different CSS files on your site, they might take quite long to load. Using PHP, you can compress them into a single file with no unnecessary white spaces or comments.
This snippet has been previously discussed on my “3 ways to compress CSS files using PHP” article.
`01.``header(``'Content-type: text/css'``);`
`02.``ob_start(``"compress"``);`
`03.``function` `compress(``$buffer``) {`
`04.``/* remove comments */`
`05.``$buffer` `= preg_replace(``'!/\*[^*]*\*+([^/][^*]*\*+)*/!'``, ``''``, ``$buffer``);`
`06.``/* remove tabs, spaces, newlines, etc. */`
`07.``$buffer` `= ``str_replace``(``array``(``"\n"``, ``""``, ``"\n"``, ``"\t"``, ``' '``, ``' '``, ``' '``), ``''``, ``$buffer``);`
`08.``return` `$buffer``;`
`09.``}`
`10.`
`11.``/* your css files */`
`12.``include``(``'master.css'``);`
`13.``include``(``'typography.css'``);`
`14.``include``(``'grid.css'``);`
`15.``include``(``'print.css'``);`
`16.``include``(``'handheld.css'``);`
`17.`
`18.``ob_end_flush();`Source: http://www.phpsnippets.info/compress-css-files-using-php