未捕获错误:在null |$chosen_shipping_rates上调用成员函数get()

Question

我在WP/WC网站上收到以下错误。这将根据发货方式从结账中删除某些付款方式。这与最近的更新有关吗？我也看到这可能与对象缓存有关，但如果不重写函数，我会有点困惑。

错误：

An error of type E_ERROR was caused in line 746 of the file /xxx/wp-content/themes/xxx/functions.php. Error message: Uncaught Error: Call to a member function get() on null in /xxx/wp-content/themes/xxx/functions.php:746

正在使用的代码：

function my_custom_available_payment_gateways( $gateways ) {
$chosen_shipping_rates = WC()->session->get( 'chosen_shipping_methods', array() );
if ( in_array( 'betrs_shipping:252-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:131-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:132-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:133-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:134-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:135-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:150-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:136-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:207-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:137-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:208-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:138-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:215-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:139-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:219-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
endif;
return $gateways;
}
add_filter( 'woocommerce_available_payment_gateways', 'my_custom_available_payment_gateways' );

Answer 1

对代码进行null检查，以防止在会话为null时调用函数：

add_filter( 'woocommerce_available_payment_gateways', 'filter_woocommerce_available_payment_gateways' );
function filter_woocommerce_available_payment_gateways( $gateways ) {
$session = WC()->session;
if ( $session ) {
$chosen_shipping_rates = $session->get( 'chosen_shipping_methods', [] );
if ( in_array( 'betrs_shipping:252-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:131-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:132-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:133-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:134-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:135-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:150-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:136-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:207-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:137-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:208-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:138-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:215-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:139-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
elseif ( in_array( 'betrs_shipping:219-1', $chosen_shipping_rates ) ) :
// Remove bank transfer payment gateway
unset( $gateways['sagepayform'] );
endif;
}
return $gateways;
}