src/SimpleDOM.php
public function addClass($class)
    {
        if (!$this->hasClass($class)) {
            $current = (string)$this['class'];

            if ($current !== ''
                && substr($current, -1) !== ' '
            ) {
                $this['class'] .= ' ';
            }

            $this['class'] .= $class;
        }

        return $this;
    }
public function addClass($class)
    {
        if (!$this->hasClass($class)) {
            $current = (string)$this['class'];

            if ($current !== ''
                && substr($current, -1) !== ' '
            ) {
                $this['class'] .= ' ';
            }

            $this['class'] .= $class;
        }

        return $this;
    }
public function addClass ( $ class ) { if ( ! $ this -> hasClass ( $ class ) ) { $ current = ( string ) $ this [ 'class' ] ; if ( $ current !== '' && substr ( $ current , - 1 ) !== ' ' ) { $ this [ 'class' ] .= ' ' ; } $ this [ 'class' ] .= $ class ; } return $ this ; }
Add given class to current node

@param    string $class Class name
@return    SimpleDOM            Current node
Add given class to current node