当免费送货可用时隐藏所有其他运送方式

https:// Hide ALL shipping options when free shipping is available
add_filter( 'woocommerce_available_shipping_methods', 'hide_all_shipping_when_free_is_available' , 10, 1 );
 
/**
* Hide ALL Shipping option when free shipping is available
*
* @param array $available_methods
*/
function hide_all_shipping_when_free_is_available( $available_methods ) {
 
    if( isset( $available_methods['free_shipping'] ) ) :
 
    https:// Get Free Shipping array into a new array
    $freeshipping = array();
    $freeshipping = $available_methods['free_shipping'];
 
    https:// Empty the $available_methods array
    unset( $available_methods );
 
    https:// Add Free Shipping back into $avaialble_methods
    $available_methods = array();
    $available_methods[] = $freeshipping;
 
  endif;
 
  return $available_methods;
}

在哪里添加此代码？

将PHP代码放在主题或子主题functions.php文件的底部。