问题
I’m trying to unset two shipping methods only if cart has 4 or less products from a specific shipping class.
Shipping Methods: flat_rate:20 and flat_rate:21
Shipping Class: 182
This is what I have:
add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package )
{
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
// Shipping Class To Find
$class = 182;
// Number Of Shipping Class Items In Cart
$amount = 4;
// Shipping Methods To Hide
$method_key_ids = array('flat_rate:20', 'flat_rate:21');
// Checking In Cart Items
foreach( $package['contents'] as $item ) {
// If We Find The Shipping Class and Number of Items
if( $item['data']->get_shipping_class_id() == $class && count($package['contents']) <= $amount ){
foreach( $method_key_ids as $method_key_id ){
unset($rates[$method_key_id]); // Remove Targeted Methods
}
break; // Stop The Loop
}
}
return $rates;
}
I would like to combine the above logic with the below logic:
add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package ) {
$targeted_class_ids = array(182); // Shipping Class To Find
$allowed_max_qty = 4; // Max allowed quantity for the shipping class
$shipping_rates_ids = array( // Shipping Method rates Ids To Hide
'wf_shipping_ups:07',
'wf_shipping_ups:08',
'wf_shipping_ups:11',
'wf_shipping_ups:54',
'wf_shipping_ups:65',
'wf_shipping_ups:70',
'wf_shipping_ups:74',
'free_shipping:2',
'request_shipping_quote'
);
$related_total_qty = 0;
// Checking cart items for current package
foreach( $package['contents'] as $key => $cart_item ) {
if( in_array( $cart_item['data']->get_shipping_class_id(), $targeted_class_ids ) ){
$related_total_qty += $cart_item['quantity'];
}
}
// When total allowed quantity is more than allowed (for items from defined shipping classes)
if ( $related_total_qty > $allowed_max_qty ) {
// Hide related defined shipping methods
foreach( $shipping_rates_ids as $shipping_rate_id ) {
if( isset($rates[$shipping_rate_id]) ) {
unset($rates[$shipping_rate_id]); // Remove Targeted Methods
}
}
}
return $rates;
}
To create the following logic:
1. If cart has 4 or less products in shipping class 181 unset the following shipping methods:
- 'flat_rate:20'
- 'flat_rate:21'
2. If cart has 5 or more products in shipping class 181 unset the following shipping method:
- 'wf_shipping_ups:07'
- 'wf_shipping_ups:08'
- 'wf_shipping_ups:11'
- 'wf_shipping_ups:54'
- 'wf_shipping_ups:65'
- 'wf_shipping_ups:70'
- 'wf_shipping_ups:74'
- 'free_shipping:2'
- 'request_shipping_quote'
Both codes work if I use them individually. But I get an error when I try to use both concurrently.
I get the following error: Cannot redeclare hide_shipping_method_based_on_shipping_class() (previously declared in /functions.php:272)
回答1:
You should use different function names for each code snippet, but the best way is to merge everything in a unique function.
Here is the way to make it work in a unique function (for items from specific shipping method(s)):
- hiding some shipping methods when there are 4 or less items in cart
- hiding some other shipping methods when there are 4 or less items in cart
The code:
add_filter( 'woocommerce_package_rates', 'show_hide_shipping_methods_based_on_shipping_class', 10, 2 );
function show_hide_shipping_methods_based_on_shipping_class( $rates, $package ) {
$targeted_class_ids = array(182); // Shipping Class To Find
$allowed_max_qty = 4; // Max allowed quantity for the shipping class
$shipping_rates_ids1 = array( // Shipping Method rates Ids To Hide if more than 4 items are in cart
'wf_shipping_ups:07',
'wf_shipping_ups:08',
'wf_shipping_ups:11',
'wf_shipping_ups:54',
'wf_shipping_ups:65',
'wf_shipping_ups:70',
'wf_shipping_ups:74',
'free_shipping:2',
'request_shipping_quote',
);
$shipping_rates_ids2 = array( // Shipping Method rates Ids to Hide if 4 or less items are in cart
'flat_rate:20',
'flat_rate:20',
);
$related_total_qty = 0; // Initializing
// Checking cart items for current package
foreach( $package['contents'] as $key => $cart_item ) {
if( in_array( $cart_item['data']->get_shipping_class_id(), $targeted_class_ids ) ){
$related_total_qty += $cart_item['quantity'];
}
}
// When total allowed quantity is more than allowed (for items from defined shipping classes)
if ( $related_total_qty > $allowed_max_qty ) {
// Hide related defined shipping methods (more than 4 items)
foreach( $shipping_rates_ids1 as $shipping_rate_id ) {
if( isset($rates[$shipping_rate_id]) ) {
unset($rates[$shipping_rate_id]); // Remove Targeted Methods
}
}
} else {
// Hide related defined shipping methods (4 or less items)
foreach( $shipping_rates_ids2 as $shipping_rate_id ) {
if( isset($rates[$shipping_rate_id]) ) {
unset($rates[$shipping_rate_id]); // Remove Targeted Methods
}
}
}
return $rates;
}
Code goes in functions.php file of your active child theme (or active theme). Untested it should works.
Refresh the shipping caches:
- This code is already saved on your functions.php file.
- In a shipping zone settings, disable / save any shipping method, then enable back / save.
You are done and you can test it.
Handling number of items instead of items cumulated quantity:
Replace:
$related_total_qty += $cart_item['quantity'];
by
$related_total_qty++;
回答2:
I assume you've combined those two code snippet by writing them one after another.
As you've used same function name twice, you got that error: Cannot redeclare.....
So, you can try to fix it by renaming the function name of the 2nd snippet like this -
add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class_logic_2', 10, 2 );
function hide_shipping_method_based_on_shipping_class_logic_2( $rates, $package ) {
// other stuffs
}
来源：https://stackoverflow.com/questions/63538793/show-or-hide-shipping-methods-based-on-number-of-cart-items-for-specific-shippin