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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package silvershop-shipping  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class OrderShippingExtension extends DataExtension  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $db = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'ShippingTotal' => 'Currency'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $has_one = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'ShippingMethod' => 'ShippingMethod'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function createShippingPackage()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        //create package, with total weight, dimensions, value, etc  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $weight = $width = $height = $depth = $value = $quantity = 0;  | 
            
                            
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                        $items = $this->owner->Items();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (!$items->exists()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return new ShippingPackage();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $weight = $items->Sum('Weight', true); //Sum is found on OrdItemList (Component Extension) | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $width = $items->Sum('Width', true); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $height = $items->Sum('Height', true); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $depth = $items->Sum('Depth', true); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $value = $this->owner->SubTotal();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $quantity = $items->Quantity();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $package = new ShippingPackage($weight,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            array($height,$width,$depth),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'value' => $value,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'quantity' => $quantity  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $package;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get shipping estimates  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return DataList  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getShippingEstimates()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        //$package = $this->order->createShippingPackage();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $address = $this->owner->getShippingAddress();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $estimator = new ShippingEstimator($this->owner, $address);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $estimates = $estimator->getEstimates();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $estimates;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Set shipping method and shipping cost  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param $option - shipping option to set, and calculate shipping from  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return boolean sucess/failure of setting  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                        
            
                                    
            
            
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                    public function setShippingMethod(ShippingMethod $option)  | 
            
            
                                                        
            
                                    
            
            
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                        $package = $this->owner->createShippingPackage();  | 
            
            
                                                        
            
                                    
            
            
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                        if (!$package) { | 
            
            
                                                        
            
                                    
            
            
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                            throw new Exception(_t("OrderShippingExtension.NoPackage", "Shipping package information not available")); | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        $address = $this->owner->getShippingAddress();  | 
            
            
                                                        
            
                                    
            
            
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                        if (!$address || !$address->exists() && $option->requiresAddress()) { | 
            
            
                                                        
            
                                    
            
            
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                            throw new Exception(_t("OrderShippingExtension.NoAddress", "No address has been set")); | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        $this->owner->ShippingTotal = $option->calculateRate($package, $address);  | 
            
                            
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                        $this->owner->ShippingMethodID = $option->ID;  | 
            
            
                                                        
            
                                    
            
            
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                        $this->owner->write();  | 
            
            
                                                        
            
                                    
            
            
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                        return true;  | 
            
            
                                                        
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.