public function resolveVariable($key)
    {
        $key = trim($key);

        if (($result = $this->executeFunction($key)) !== Constants::NOT_RESOLVED) {
            return $result;
        }

        return Constants::NOT_RESOLVED;
    }
public function resolveVariable($key)
    {
        $key = trim($key);

        if (($result = $this->executeFunction($key)) !== Constants::NOT_RESOLVED) {
            return $result;
        }

        return Constants::NOT_RESOLVED;
    }
public function resolveVariable ( $ key ) { $ key = trim ( $ key ) ; if ( ( $ result = $ this -> executeFunction ( $ key ) ) !== Constants :: NOT_RESOLVED ) { return $ result ; } return Constants :: NOT_RESOLVED ; }
Resolve variable.

@param $key

@return string
Resolve variable .