    function updateObject($object, $table, $where=null, $identifier='id', $is_revisioned=false) {

        if ($is_revisioned) {
            $object->revision_id++;
            //if ($table=="text") eDebug($object);
            $res = $this->insertObject($object, $table);
            //if ($table=="text") eDebug($object,true); 
            $this->trim_revisions($table, $object->$identifier, WORKFLOW_REVISION_LIMIT);
            return $res;
        }
        $sql = "UPDATE " . $this->prefix . "$table SET ";
        foreach (get_object_vars($object) as $var => $val) {
            //We do not want to save any fields that start with an '_'
            //if($is_revisioned && $var=='revision_id') $val++;
            if ($var{0} != '_') {
                if (is_array($val) || is_object($val)) {
                    $val = serialize($val);   
                    $sql .= "`$var`='".$val."',";
                } else {
                    $sql .= "`$var`='" . $this->escapeString($val) . "',";
                }
            }
        }
        $sql = substr($sql, 0, -1) . " WHERE ";
        if ($where != null)
            $sql .= $this->injectProof($where);
        else
            $sql .= "`" . $identifier . "`=" . $object->$identifier;
        //if ($table == 'text') eDebug($sql,true);        
        $res = (@mysqli_query($this->connection, $sql) != false);
        return $res;
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.