├── LICENSE
├── README
└── minify.php


/LICENSE:
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 1 | This is free and unencumbered software released into the public domain.
 2 | 
 3 | Anyone is free to copy, modify, publish, use, compile, sell, or
 4 | distribute this software, either in source code form or as a compiled
 5 | binary, for any purpose, commercial or non-commercial, and by any
 6 | means.
 7 | 
 8 | In jurisdictions that recognize copyright laws, the author or authors
 9 | of this software dedicate any and all copyright interest in the
10 | software to the public domain. We make this dedication for the benefit
11 | of the public at large and to the detriment of our heirs and
12 | successors. We intend this dedication to be an overt act of
13 | relinquishment in perpetuity of all present and future rights to this
14 | software under copyright law.
15 | 
16 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19 | IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 | OTHER DEALINGS IN THE SOFTWARE.
23 | 
24 | For more information, please refer to <https://unlicense.org>
25 | 


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/README:
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1 | Quick and dirty PHP function to minify common parts of CSS.
2 | 
3 | This code is old; it worked at the time but may not support some of the more complex syntaxes of CSS3. For that, use a proper parser and minifier.
4 | 
5 | As per the [LICENSE], this code is in the public domain, and can be used/amended as you wish, without attribution.
6 | 
7 | There is no intent to improve the code in the future.
8 | 


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/minify.php:
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 1 | <?php
 2 | /**
 3 |  * Quick and dirty way to mostly minify CSS.
 4 |  *
 5 |  * @since 1.0.0
 6 |  * @author Gary Jones
 7 |  *
 8 |  * @param string $css CSS to minify
 9 |  * @return string Minified CSS
10 |  */
11 | function minify( $css ) {
12 | 
13 | 	// Normalize whitespace
14 | 	$css = preg_replace( '/\s+/', ' ', $css );
15 | 	
16 | 	// Remove spaces before and after comment
17 | 	$css = preg_replace( '/(\s+)(\/\*(.*?)\*\/)(\s+)/', '$2', $css );
18 | 
19 | 	// Remove comment blocks, everything between /* and */, unless
20 | 	// preserved with /*! ... */ or /** ... */
21 | 	$css = preg_replace( '~/\*(?![\!|\*])(.*?)\*/~', '', $css );
22 | 
23 | 	// Remove ; before }
24 | 	$css = preg_replace( '/;(?=\s*})/', '', $css );
25 | 
26 | 	// Remove space after , : ; { } */ >
27 | 	$css = preg_replace( '/(,|:|;|\{|}|\*\/|>) /', '$1', $css );
28 | 
29 | 	// Remove space before , ; { } ( ) >
30 | 	$css = preg_replace( '/ (,|;|\{|}|\(|\)|>)/', '$1', $css );
31 | 
32 | 	// Strips leading 0 on decimal values (converts 0.5px into .5px)
33 | 	$css = preg_replace( '/(:| )0\.([0-9]+)(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}.${2}${3}', $css );
34 | 
35 | 	// Strips units if value is 0 (converts 0px to 0)
36 | 	$css = preg_replace( '/(:| )(\.?)0(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}0', $css );
37 | 
38 | 	// Converts all zeros value into short-hand
39 | 	$css = preg_replace( '/0 0 0 0/', '0', $css );
40 | 
41 | 	// Shortern 6-character hex color codes to 3-character where possible
42 | 	$css = preg_replace( '/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3/i', '#\1\2\3', $css );
43 | 
44 | 	return trim( $css );
45 | 
46 | }
47 | 


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