Reading this article realization includes / classes / shipping.php shipping class
关于MODULE_SHIPPING_INSTALLED
It indicates the system has been installed in the module, as described in the background arrangement
Installed Modules
List of shipping module filenames separated by a semi-colon. This is automatically updated. No need to edit. (Example: ups.php;flat.php;item.php)Please make the necessary changes
Module Installed
list of file names shipping modules, separated by semicolons.
This automatically updated. Without editing. (Example: ups.php; flat.php; item.php)
The role of the constructor
1. Load module you have installed
Loading principle is above MODULE_SHIPPING_INSTALLED, this database configuration, this configuration in the configuration group id = 6 hidden inside, in fact the background is not displayed, but can http:? //Localhost/ZenCart156cDev/sprAy-Dsk-birtH/configuration.php gID = 6 access to this configuration group
This field is additional configuration loaded into the system at the time includes / init_includes / init_db_config_read.php initialization.
Dividing the value of this field, the array element
Loop through the array - to get the class name and file name
Then load in DIR_WS_MODULES. 'Shipping /' directory
First load module corresponding language file, and then load the module itself
Sign up to $ GLOBALS variable last to go, class name as an index value as an instance of the class
2. The load module corresponding language
The module attributes, determining whether to turn on or off the module
The principle is to use check_enabled check function, function of the parameter types - using class instance as an input parameter. Internal inspection method which method_exists whether a class instance object specified method, then the method invocation, or instance check_enabled_for_zone check_enabled.
So far shipping has actually achieved, characteristics similar .net reflection, but also the realization of the principle of plug-in mechanism.
You can call on a specific implementation class shipping, such as flat class function, achieve easy expansion characteristics.
Return plug-in is enabled in accordance with the following order of priority
First: Default $ enabled = $ class-> enabled; default, in fact, is initialized when the class constructor executes flat properties, internal calls zen_get_shipping_enabled function, and the area was examined
第二：$enabled = $class->check_enabled_for_zone();
第三：$enabled = $class->check_enabled();
4. instantiation module configured instance of the object, and to register the global variable which is the ultimate purpose of []
$modules
Constructor defined in this attribute
This property only after the results of the simple installation module "MODULE_SHIPPING_INSTALLED" division, with no further
MODULE_SHIPPING_INSTALLED
During initialization, just read the Configuration Groups 2 and 3, MODULE_SHIPPING_INSTALLED in the configuration group inside the 6, then it is how to read it?
This problem has been answered, seen from above
Properties of the module - based on flat
code-- module identification code, usually the class name, and class files with the same name, and refer to it in the $ GLOBALS variable
title-- module title, defined in the language file
description-- module itself is described, defined in the language file
sort_order--, the sort field is defined determines whether the module is enabled, it is also very important
icon icon ---
Use taxes tax_class--
What tax_basis-- is a tax based on the math
On what basis is Shipping Tax calculated. Options are
Shipping - Based on customers Shipping Address
Billing Based on customers Billing address
Store - Based on Store address if Billing/Shipping Zone equals Store zoneWhether the module is enabled enabled--
_check-- widget attributes used to read the status value MODULE_SHIPPING_FLAT_STATUS
The role of zen_get_shipping_enabled
disable only when entire cart is free shipping
disabled only when the entire cart free shipping
This function is listed first internal comments
for admin always true if installed
for administrators, if installed, it is always true
Free Shipping when 0 weight - enable freeshipper - ORDER_WEIGHT_ZERO_STATUS must be on
free shipping zero weight - weight must be enabled freeshipper- orders 0 state
Free Shipping when 0 weight - disable everyone - ORDER_WEIGHT_ZERO_STATUS must be on
free shipping when the weight of 0 - disables all of us - the weight of the order must be 0
Always free shipping only true - enable freeshipper
always free shipping - enabled freeshipper
Always free shipping only true - disable everyone
always free shipping - disabled owner
Always free shipping only is false - disable freeshipper
always free shipping is wrong - Disabled Free Shipping
At the same time it involved a function
$_SESSION['cart']->in_cart_check('product_is_always_free_shipping','1');
Check the number of products specified field
$_SESSION['cart']->count_contents();
Statistics shopping total item
$_SESSION['cart']->show_weight();
The total weight of the Statistical cart
About quote method
Returns a reference to the method, this method returns a reference to all the modules, a module may return a reference to a separate
Internal implementation mechanisms are:
First of all references to $ shipping_weight, $ uninsurable_value; $ uninsurable_value represents the shipping insurance to see if there is a specific class method get_uninsurable_value
Defined $ quotes_array, which is our ultimate array of objects to be returned, only this array object contains a module has been enabled
Through two cycles, the analysis module you want from a $ this-> modules properties
Foreach loop implements a first check from $ GLOBALS, enabled determination module adds only enabled to deposit $ quotes_array module
Second cycle, the update status; quote calling a specific method of shipping, and re-calculated weight of the global variable assignment
The next question is: flat shipping How is it calculated?
$ Shipping_weight When was the definition?
Session $ _SESSION [ 'shipping'] is what is written?
shipping module instantiation, have been identified and check the good which modules can be used
About envisaged demand environment
Free International Shipping on all orders
All orders fixed a postage
All orders fixed a postage, but enable the individual to a particular area
How many full amount of the order, on Free International Shipping
Order amount set interval range, not in the scope of the freight is not the same
Order number of installations Free International Shipping
About flat class
This is a flat-rate shipping modules, all orders shipping costs are the same, but can also be set to open in an area
Quote on flat class method
quote Chinese meaning is a reference, this method is to return relevant information for such a reference
Stored in quotes within an array, the following structure
Id-- unique identifier module, do not repeat globally
The title module-- module is defined in the language pack
methods-- This is an array that contains calculated on freight
tax-- tax rate
icon-- freight icon
Flat.php binding assay modules and freeshipper.php module, both the write mode at the same height
flat.php ---- means that all orders unified freight, tax rate
freeshipper.php ---- represents Free International Shipping
flat configuration module is in the area where the set? Temporarily unknown
zen_cfg_pull_down_zone_classes
