<?php
$contents = <<<EOS
/* hide from ie5/mac \*/ a{}
.foo {color:red}
/* necessary comment */

/* comment to attempt to confuse parser */

/* feed to ie5/mac \*//*/
@import "ie5mac.css";
/* necessary comment */

/* comment to attempt to\ confuse parser */

/* comment to attempt to confuse parser */

/*/ feed to nav *//*/
.foo {display:crazy;}
/* necessary comment */

/* hide props from various IE/win */
div {
    width: 140px;
    width/* */:/**/100px;
    width: /**/100px;
}

html>/**/body {}

/* Tantek's box model hack */
div {
  width:400px;
  voice-family: "\"}\"";
  voice-family:inherit;
  width:300px;
}

/* don't minimize hex colors in filters */
div {
  filter:chroma(color=#aabbcc);
  filter:mask(color=#000000) shadow(color=#9BAD71, direction=135) chroma(color=#000000);
}

@media screen {
    /* for IE 5.x-6, hidden from IE 5 Mac */ /*\*/
    * html div#page {
        height: 1%;
    }
    /**/ /* end hidden from IE 5 Mac */
}

foo { /* filters for IE */
    _height : 20px;
    *height : 15px;
}

/* http://tantek.com/CSS/Examples/midpass.html */
@media tty {
 i{content:"\";/*" "*/}} @import 'midpassafter.css'; /*";}
}/* */

/* leave at least 1 space between these pseudo elements and "{" for IE6: http://www.crankygeek.com/ie6pebug/ */
p:first-letter  {color:red;}
p:first-line   {color:red;}

EOS;


// Make comments identifiable by adding "^*" to start and "$*" to end,
// except for comment that come right after a ">" as those are probably
// a hack (http://www.webdevout.net/css-hacks#in_css-selectors).
// The regular expression for comments is a modified version of the one
// found here: http://www.w3.org/TR/CSS21/syndata.html#tokenization.
$contents = preg_replace('@(?<!\>)/\*([^*]*\*+([^/*][^*]*\*+)*)/@', '/*^*\1$*/', $contents);

// Remove identifiers from ie-mac (both hide and feed) hack comments.
$contents = preg_replace('@
  /\*\^\*([^*]*\*+([^/*][^*]*\*+)*)(?<=\\\\\*)\$\*/  # A comment that ends with "\*$*/"
    ([^/]+)?                                         # Anything between the two comments
  /\*\^\*([^*]*\*+([^/*][^*]*\*+)*)\$\*/             # The necessary comment afterwards
  @x', '/*${1}/${3}/*${4}/', $contents);

// Remove comments that still contain our identifiers.
$contents = preg_replace('@/\*\^\*[^*]*\*+([^/*][^*]*\*+)*\$\*/@', '', $contents);

// Remove unnecessary whitespace.
$contents = preg_replace('<
  (?:\s*([@{}:;,]|\)\s|\s\()\s*) # Whitespace around separators, but keep space around parentheses.
  | (?:(\*/)\s+(\s))             # Whitespace between and after comments.
  >x', '\1\2\3', $contents);

// Remove unnecessary last ";" from rulesets.
$contents = str_replace(';}', '}', $contents);

// Leave at least 1 space between the first-letter and first-line pseudo elements and "{"
// http://www.crankygeek.com/ie6pebug/
$contents = preg_replace('<first-(letter|line){>', 'first-\1 {', $contents);

echo $contents;
?>