<?php
/**
* Wave Framework <http://github.com/kristovaher/Wave-Framework>
* Minifier Class
*
* Minifier is used to minify text data without breaking functionality of that text. This is
* useful to be applied to JavaScript, CSS Stylesheets, HTML and XML formats for purposes of
* making the file size smaller, thus increasing the performance when file is transferred over
* HTTP. You should be careful when using minifier however, since it might break functionality
* under some instances, so it is always good to test before deploying minified resources to
* live systems.
*
* @package Minifier
* @author Kristo Vaher <kristo@waher.net>
* @copyright Copyright (c) 2012, Kristo Vaher
* @license GNU Lesser General Public License Version 3
* @tutorial /doc/pages/minifier.htm
* @since 1.7.0
* @version 3.4.8
*/
class WWW_Minifier {
/**
* This method removes comments, tabs, spaces, new-lines and various other spaces from
* text. It assumes that text is in a CSS-like format.
*
* @param string $data data string to be minified
* @return string
*/
public static function minifyCSS($data){
// Removing comments
$data=preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!','',$data);
// Removing tabs, spaces and newlines
$data=str_replace(array("\r\n","\r","\n","\t",' ',' ',' '), '', $data);
// Removing other spaces before and after
$data=preg_replace(array('(( )+{)','({( )+)'),'{',$data);
$data=preg_replace(array('(( )+})','(}( )+)','(;( )*})'),'}',$data);
$data=preg_replace(array('(;( )+)','(( )+;)'),';',$data);
//Returning minified string
return $data;
}
/**
* This method removes comments, tabs, spaces, new-lines and various other spaces from
* text. It assumes that text is in a JavaScript-like format.
*
* @param string $data data string to be minified
* @return string
*/
public static function minifyJS($data){
// Removing comments
$data=preg_replace('/((?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:\/\/.*))/','',$data);
// Removing tabs and newlines
$data=str_replace(array("\r\n","\r","\n"),'',$data);
// Removing whitespace
$data=preg_replace('/\s+/', ' ',$data);
//Returning minified string
return $data;
}
/**
* This method removes comments, tabs, spaces, new-lines and various other spaces from
* text. It assumes that text is in a HTML-like format.
*
* @param string $data data string to be minified
* @return string
*/
public static function minifyHTML($data){
// Remove newlines and tabs
$data=preg_replace('/[\r\n\t]/i','',$data);
// Remove comments
$data=preg_replace('/<!--.*?-->/i','',$data);
//Returning minified string
return $data;
}
/**
* This method removes comments, tabs, spaces, new-lines and various other spaces from
* text. It assumes that text is in a XML-like format.
*
* @param string $data data string to be minified
* @return string
*/
public static function minifyXML($data){
// Remove newlines and tabs
$data=preg_replace('/[\r\n\t]/i','',$data);
// Remove comments
$data=preg_replace('/<!--.*?-->/i','',$data);
//Returning minified string
return $data;
}
}
?>
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