futtta / autoptimize

    }

    // unhide noptimize-tags

    protected function restore_noptimize($noptimize_in) {

        if ( strpos( $noptimize_in, '%%NOPTIMIZE%%' ) !== false ) { 

            $noptimize_out = preg_replace_callback(

                '#%%NOPTIMIZE'.AUTOPTIMIZE_HASH.'%%(.*?)%%NOPTIMIZE%%#is',

                create_function(

                    '$matches',

                    'return base64_decode($matches[1]);'

                ),

                $noptimize_in

            );

        } else {

            $noptimize_out = $noptimize_in;

        }

        return $noptimize_out;

    }

    protected function hide_iehacks($iehacks_in) {

        if ( strpos( $iehacks_in, '<!--[if' ) !== false ) { 

        return $iehacks_out;

    }

    protected function restore_iehacks($iehacks_in) {

        if ( strpos( $iehacks_in, '%%IEHACK%%' ) !== false ) { 

            $iehacks_out = preg_replace_callback(

                '#%%IEHACK'.AUTOPTIMIZE_HASH.'%%(.*?)%%IEHACK%%#is',

                create_function(

                    '$matches',

                    'return base64_decode($matches[1]);'

                ),

                $iehacks_in

            );

        } else {

            $iehacks_out=$iehacks_in;

        }

        return $iehacks_out;

    }

    protected function hide_comments($comments_in) {

        if ( strpos( $comments_in, '<!--' ) !== false ) {

        return $comments_out;

    }

    protected function restore_comments($comments_in) {

        if ( strpos( $comments_in, '%%COMMENTS%%' ) !== false ) {

            $comments_out = preg_replace_callback(

                '#%%COMMENTS'.AUTOPTIMIZE_HASH.'%%(.*?)%%COMMENTS%%#is',

                create_function(

                    '$matches',

                    'return base64_decode($matches[1]);'

                ),

                $comments_in

            );

        } else {

            $comments_out=$comments_in;

        }

        return $comments_out;

    }

    protected function url_replace_cdn( $url ) {

        // API filter to change base CDN URL

    }

    // inject already minified code in optimized JS/CSS

    protected function inject_minified($in) {

        if ( strpos( $in, '%%INJECTLATER%%' ) !== false ) {

            $out = preg_replace_callback(

                '#\/\*\!%%INJECTLATER'.AUTOPTIMIZE_HASH.'%%(.*?)%%INJECTLATER%%\*\/#is',

                create_function(

                    '$matches',

                    '$filepath=base64_decode(strtok($matches[1],"|"));

                    $filecontent=file_get_contents($filepath);

                    // remove BOM

                    $filecontent = preg_replace("#\x{EF}\x{BB}\x{BF}#","",$filecontent);

                    // remove comments and blank lines

                    if (substr($filepath,-3,3)===".js") {

                        $filecontent=preg_replace("#^\s*\/\/.*$#Um","",$filecontent);

                    }

                    $filecontent=preg_replace("#^\s*\/\*[^!].*\*\/\s?#Um","",$filecontent);

                    $filecontent=preg_replace("#(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+#", "\n", $filecontent);

                    // differentiate between JS, CSS and other files

                    if (substr($filepath,-3,3)===".js") {

                        if ((substr($filecontent,-1,1)!==";")&&(substr($filecontent,-1,1)!=="}")) {

                            $filecontent.=";";

                        }

                        if (get_option("autoptimize_js_trycatch")==="on") {

                            $filecontent="try{".$filecontent."}catch(e){}";

                        }

                    } else if ((substr($filepath,-4,4)===".css")) {

                        $filecontent=autoptimizeStyles::fixurls($filepath,$filecontent);

                    } else {

                        $filecontent="";

                    }

                    // return 

                    return "\n".$filecontent;'

                ),

                $in

            );

        } else {

            $out = $in;

        }

        return $out;

    }

    protected function minify_single($pathIn) {

		// determine JS or CSS and set var (also mimetype), return false if neither

		if ( $this->str_ends_in($pathIn,".js") === true ) {

			$codeType="js";

			$codeMime="text/javascript";

		} else if ( $this->str_ends_in($pathIn,".css") === true ) {

			$codeType="css";