CSS minify with PHP extension

No, you can't easily do it as minify heavily depends on file extensions (css,js,?). For example it is used to determine what HTTP headers send to client(application/x-javascript,text/css,?), what minifier class to use, is this file safe to parse etc.

But I'm almost certain that this situation can be avoided. Could you please describe why exactly you want to do this?

If you insist on doing it this way I can propose a few dirty hacks to make it work, but it requires changing minify's source code so I don't really know if that is a good idea.

Upd:

There is no nice way to change this source: it has really bad structure. In minify v2.1.3 you can simply change the following:

Path: lib/Minify/Controller/Base.php##Minify_Controller_Base::_fileIsSafe()

return in_array(strrev($revExt), array('js', 'css', 'html', 'txt'));

-->

return in_array(strrev($revExt), array('js', 'css', 'html', 'txt', 'php'));

Path: lib/Minify/Controller/MinApp.php##Minify_Controller_MinApp::setupSources()

preg_match('/^[^,]+\\.(css|js)(?:,[^,]+\\.\\1)*$/', $_GET['f'])

-->

preg_match('/^[^,]+\\.(css|js|php)(?:,[^,]+\\.\\1)*$/', $_GET['f'])

Path: lib/Minify/##Minify_Source::__construct()

case 'css'  : $this->contentType = 'text/css';

-->

case 'php': case 'css': $this->contentType = 'text/css';

and everything will work, but you must set $min_serveOptions['minApp']['allowDirs'] in configuration carefully as any user may be able to view any php file from this directories.

Using CSS Min, you are freely could do whatsoever and you could also "processing" your stlyesheet in php script, then minify it on the fly : its DEAD simple to do that, and guess what, it just A SINGLE FILE.

Another way is, dont use any PHP script to process or doing some logical at your css file, instead, you could have separated small css file then you just load whatever you want by building new cache file or just combine and output the link tag.

However, if you are now have something like this in your common.php (php file/script that outputing the css, yes?)

<?php 
    $style = '';
    $bodyStyle =  'body {
            background-color: #000;
            margin: 40px;
            font: 13px/20px normal Helvetica, Arial, sans-serif;
            color: #fff;
            }';
    // I assumed you are about proccesing something here..
    // ...
    // Then you merged all style into one string, and output it as css file
    $style = $bodyStyle + $otherStyle + $whateverStyle;
    header('Content-Type: text/css');
    echo $style;
?>

And you still want to make your app bloated and make your code more unreadable (wait, there still more...), also want to modify Minify class/lib to minify and cache you pseudo-css-php, then you need to "hacking" the source as follow :

• lib/Minify/Controller/Base.php : 135, change to :

  return in_array(strrev($revExt), array('js', 'css', 'html', 'txt', 'php'));

• lib/Minify/Controller/MinApp.php : 75, change to :

  ! preg_match('/^[^,]+\\.(css|js|php)(?:,[^,]+\\.\\1)*$/', $_GET['f'])

• lib/Minify/Source.php, change several things :

Add one variable as a PHP flag, in , after line 41 perhaps

/**
 * @var bool
 */
public $isPHP = FALSE;

In same file, at line : 67, add a condition :

case 'php'  : $this->isPHP = TRUE;
              $this->contentType = 'text/css';
              break;

Last, replace getContent() function, into :

public function getContent()
{
    if($this->isPHP)
    {
        include($this->filepath);
    }
    else 
    {
        $content = (null !== $this->filepath)
                ? file_get_contents($this->filepath)
                : ((null !== $this->_content)
                    ? $this->_content
                    : call_user_func($this->_getContentFunc, $this->_id)
                );
    }

    // remove UTF-8 BOM if present
    return (pack("CCC",0xef,0xbb,0xbf) === substr($content, 0, 3))
        ? substr($content, 3)
        : $content;
}

• You also need to change your common.php into Minify spec, so now, your common.php should looks like :

You need to put all your stylesheet as string and assign it into $content variable

<?php 
    //$style = '';
    $bodyStyle =  'body {
            background-color: #000;
            margin: 40px;
            font: 13px/20px normal Helvetica, Arial, sans-serif;
            color: #fff;
            }';
    // I assumed you are about proccesing something here..
    // ...
    // Then you merged all style into one string, and output it as css file
    // $style = $bodyStyle + $otherStyle + $whateverStyle;
    // header('Content-Type: text/css');
    // echo $style;
    $content = $bodyStyle + $otherStyle + $whateverStyle;
?>

Yes, there is one and it works pretty well:

https://github.com/c9s/pecl-cssmin

The API is pretty simple:

<?php
echo cssmin("body { .... } .rule {  } .rule2 { color: #fff; }");