Index: minify_helper.php
===================================================================
--- minify_helper.php	(revision 14836)
+++ minify_helper.php	(working copy)
@@ -182,35 +182,57 @@
 		 */
 		public function compressString(&$string, $extension)
 		{
-			$tmp_file = tempnam('/tmp', 'to_compress_');
-			$fp = fopen($tmp_file, 'w');
-			fwrite($fp, $string);
-			fclose($fp);
+			$vars = kUtil::getConfigVars();
 
-			$command = 'java -jar ' . dirname(__FILE__) . DIRECTORY_SEPARATOR . 'yuicompressor-2.4.2.jar --type ' . $extension . ' --charset utf-8 ' . $tmp_file;
-			$compressed_string = shell_exec($command);
+			if ( !array_key_exists('CompressionEngine', $vars) ) {
+				// compression method not specified - use none
+				return;
+			}
 
-			unlink($tmp_file);
+			switch ( $vars['CompressionEngine'] ) {
+				case 'yui':
+					$this->compressViaJava($string, $extension);
+					break;
 
-			if (!is_null($compressed_string) && $compressed_string) {
-				$string = $compressed_string;
-				return ;
+				case 'php':
+					$this->compressViaPHP($string, $extension);
+					break;
 			}
+		}
 
-			// failed to compress using YUICompressor (maybe java not installed)
+		/**
+		 * Compresses string using YUI compressor (uses Java)
+		 *
+		 * @param string $string
+		 * @param string $extension
+		 * @return void
+		 * @access protected
+		 */
+		protected function compressViaJava(&$string, $extension)
+		{
+			$tmp_file = tempnam('/tmp', 'to_compress_');
+			file_put_contents($tmp_file, $string);
 
-			if ($extension == 'js') {
-				$minifier =& $this->Application->makeClass('JsMinifyHelper');
-				/* @var $minifier JsMinifyHelper */
+			$command = 'java -jar ' . dirname(__FILE__) . DIRECTORY_SEPARATOR . 'yuicompressor-2.4.2.jar --type ' . $extension . ' --charset utf-8 ' . $tmp_file;
+			$string = shell_exec($command);
 
-				$string = $minifier->minify($string);
-			}
-			elseif ($extension == 'css') {
-				$minifier =& $this->Application->makeClass('CssMinifyHelper');
-				/* @var $minifier CssMinifyHelper */
+			unlink($tmp_file);
+		}
 
-				$string = $minifier->minify($string);
-			}
+		/**
+		 * Compresses string using PHP compressor
+		 *
+		 * @param string $string
+		 * @param string $extension
+		 * @return void
+		 * @access protected
+		 */
+		protected function compressViaPHP(&$string, $extension)
+		{
+			$minifier =& $this->Application->makeClass($extension == 'js' ? 'JsMinifyHelper' : 'CssMinifyHelper');
+			/* @var $minifier JsMinifyHelper */
+
+			$string = $minifier->minify($string);
 		}
 
 		/**