代码实现WooCommerce：产品添加到购物车最小，最大和起始值

PHP代码段1：设置最小，最大，增量和起始值添加到购物车数量@ WooCommerce单个产品页面和购物车页面（简单产品）

add_filter( 'woocommerce_quantity_input_args', 'yongwp_woocommerce_quantity_changes', 10, 2 );

function yongwp_woocommerce_quantity_changes( $args, $product ) {
   if ( ! is_cart() ) {
      $args['input_value'] = 4; // Start from this value (default = 1) 
      $args['max_value'] = 10; // Max quantity (default = -1)
      $args['min_value'] = 4; // Min quantity (default = 0)
      $args['step'] = 2; // Increment/decrement by this value (default = 1)
   } else {
      // Cart's "min_value" is already 0 and we don't need "input_value"
      $args['max_value'] = 10; // Max quantity (default = -1)
      $args['step'] = 2; // Increment/decrement by this value (default = 0)
      // COMMENT OUT FOLLOWING IF STEP < MIN_VALUE
      // $args['min_value'] = 4; // Min quantity (default = 0)
   }
   return $args;
   
}

PHP代码段2：设置最小值添加到购物车数量@ WooCommerce单个产品页面（可变产品->单个变体）

add_filter( 'woocommerce_available_variation', 'yongwp_woocommerce_quantity_min_variation', 9999, 3 );
 
function yongwp_woocommerce_quantity_min_variation( $args, $product, $variation ) {
   $args['min_qty'] = 5;
   return $args;
}

将PHP代码段放在主题functions.php文件的底部（如果有?>  就放最底部?>之前，没有就直接放置在最后面就可以）