public function process()
        {
            if ($this->_isXhtml === null) {
                $this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
            }

            $this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
            $this->_placeholders = array();

            // replace SCRIPTs (and minify) with placeholders
            $this->_html = preg_replace_callback(
                    '/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'
                    , array($this, '_removeScriptCB')
                    , $this->_html);

            // replace STYLEs (and minify) with placeholders
            $this->_html = preg_replace_callback(
                    '/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i'
                    , array($this, '_removeStyleCB')
                    , $this->_html);

            // remove HTML comments (not containing IE conditional comments).
            $this->_html = preg_replace_callback(
                    '/<!--([\\s\\S]*?)-->/'
                    , array($this, '_commentCB')
                    , $this->_html);

            // replace PREs with placeholders
            $this->_html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
                    , array($this, '_removePreCB')
                    , $this->_html);

            // replace TEXTAREAs with placeholders
            $this->_html = preg_replace_callback(
                    '/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i'
                    , array($this, '_removeTextareaCB')
                    , $this->_html);

            // trim each line.
            // @todo take into account attribute values that span multiple lines.
            $this->_html = preg_replace('/^\\s+|\\s+$/m', '', $this->_html);

            // remove ws around block/undisplayed elements
            $this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
                    . '|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
                    . '|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
                    . '|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
                    . '|ul)\\b[^>]*>)/i', '$1', $this->_html);

            // remove ws outside of all elements
            $this->_html = preg_replace_callback(
                    '/>([^<]+)</'
                    , array($this, '_outsideTagCB')
                    , $this->_html);

            // use newlines before 1st attribute in open tags (to limit line lengths)
            $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);

            // fill placeholders
            $this->_html = str_replace(
                    array_keys($this->_placeholders)
                    , array_values($this->_placeholders)
                    , $this->_html
            );

            return $this->_html;
        }
public function process()
        {
            if ($this->_isXhtml === null) {
                $this->_isXhtml = (false !== strpos($this->_html, '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML'));
            }

            $this->_replacementHash = 'MINIFYHTML' . md5($_SERVER['REQUEST_TIME']);
            $this->_placeholders = array();

            // replace SCRIPTs (and minify) with placeholders
            $this->_html = preg_replace_callback(
                    '/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'
                    , array($this, '_removeScriptCB')
                    , $this->_html);

            // replace STYLEs (and minify) with placeholders
            $this->_html = preg_replace_callback(
                    '/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i'
                    , array($this, '_removeStyleCB')
                    , $this->_html);

            // remove HTML comments (not containing IE conditional comments).
            $this->_html = preg_replace_callback(
                    '/<!--([\\s\\S]*?)-->/'
                    , array($this, '_commentCB')
                    , $this->_html);

            // replace PREs with placeholders
            $this->_html = preg_replace_callback('/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i'
                    , array($this, '_removePreCB')
                    , $this->_html);

            // replace TEXTAREAs with placeholders
            $this->_html = preg_replace_callback(
                    '/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i'
                    , array($this, '_removeTextareaCB')
                    , $this->_html);

            // trim each line.
            // @todo take into account attribute values that span multiple lines.
            $this->_html = preg_replace('/^\\s+|\\s+$/m', '', $this->_html);

            // remove ws around block/undisplayed elements
            $this->_html = preg_replace('/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body'
                    . '|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form'
                    . '|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta'
                    . '|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)'
                    . '|ul)\\b[^>]*>)/i', '$1', $this->_html);

            // remove ws outside of all elements
            $this->_html = preg_replace_callback(
                    '/>([^<]+)</'
                    , array($this, '_outsideTagCB')
                    , $this->_html);

            // use newlines before 1st attribute in open tags (to limit line lengths)
            $this->_html = preg_replace('/(<[a-z\\-]+)\\s+([^>]+>)/i', "$1\n$2", $this->_html);

            // fill placeholders
            $this->_html = str_replace(
                    array_keys($this->_placeholders)
                    , array_values($this->_placeholders)
                    , $this->_html
            );

            return $this->_html;
        }
public function process ( ) { if ( $ this -> _isXhtml === null ) { $ this -> _isXhtml = ( false !== strpos ( $ this -> _html , '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML' ) ) ; } $ this -> _replacementHash = 'MINIFYHTML' . md5 ( $ _SERVER [ 'REQUEST_TIME' ] ) ; $ this -> _placeholders = array ( ) ; // replace SCRIPTs (and minify) with placeholders $ this -> _html = preg_replace_callback ( '/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i' , array ( $ this , '_removeScriptCB' ) , $ this -> _html ) ; // replace STYLEs (and minify) with placeholders $ this -> _html = preg_replace_callback ( '/\\s*(<style\\b[^>]*?>)([\\s\\S]*?)<\\/style>\\s*/i' , array ( $ this , '_removeStyleCB' ) , $ this -> _html ) ; // remove HTML comments (not containing IE conditional comments). $ this -> _html = preg_replace_callback ( '/<!--([\\s\\S]*?)-->/' , array ( $ this , '_commentCB' ) , $ this -> _html ) ; // replace PREs with placeholders $ this -> _html = preg_replace_callback ( '/\\s*(<pre\\b[^>]*?>[\\s\\S]*?<\\/pre>)\\s*/i' , array ( $ this , '_removePreCB' ) , $ this -> _html ) ; // replace TEXTAREAs with placeholders $ this -> _html = preg_replace_callback ( '/\\s*(<textarea\\b[^>]*?>[\\s\\S]*?<\\/textarea>)\\s*/i' , array ( $ this , '_removeTextareaCB' ) , $ this -> _html ) ; // trim each line. // @todo take into account attribute values that span multiple lines. $ this -> _html = preg_replace ( '/^\\s+|\\s+$/m' , '' , $ this -> _html ) ; // remove ws around block/undisplayed elements $ this -> _html = preg_replace ( '/\\s+(<\\/?(?:area|base(?:font)?|blockquote|body' . '|caption|center|cite|col(?:group)?|dd|dir|div|dl|dt|fieldset|form' . '|frame(?:set)?|h[1-6]|head|hr|html|legend|li|link|map|menu|meta' . '|ol|opt(?:group|ion)|p|param|t(?:able|body|head|d|h||r|foot|itle)' . '|ul)\\b[^>]*>)/i' , '$1' , $ this -> _html ) ; // remove ws outside of all elements $ this -> _html = preg_replace_callback ( '/>([^<]+)</' , array ( $ this , '_outsideTagCB' ) , $ this -> _html ) ; // use newlines before 1st attribute in open tags (to limit line lengths) $ this -> _html = preg_replace ( '/(<[a-z\\-]+)\\s+([^>]+>)/i' , "$1\n$2" , $ this -> _html ) ; // fill placeholders $ this -> _html = str_replace ( array_keys ( $ this -> _placeholders ) , array_values ( $ this -> _placeholders ) , $ this -> _html ) ; return $ this -> _html ; }
Minify the markeup given in the constructor

@return string
Minify the markeup given in the constructor