Calculate field based on other field value Apply simple math formula to dynamically calcualte a field (added in v 4.3)

  
                               $pdocrud = new PDOCrud();
                                $pdocrud->formRemoveFields(array("sale_price"));
                                /**
                                 * Set a value of field
                                 * @param   string   $fieldName                            field name to renamed
                                 * @param   string   $value                                value of the field
                                 * @param   bool     $fieldHidden                          Wheter that field is hidden or not
                                 * @param   string   $tablename                            Tablename = Required only when using join table field name
                                 * return   object                                         Object of class
                                 */
                                $pdocrud->formFieldValue("sale_price", "{price}+24", true);
                                //apply formula
                                $pdocrud->fieldFormula("sale_price", "expression",array("type" =>"math_expression"));
                                echo $pdocrud->dbTable("book")->render("insertform"); // call render function