Add snippet to adjust the quantity input values

docs/snippets/README.md

@@ -8,3 +8,5 @@ Various code snippets you can add to your site to enable custom functionality:
 -   [Rename a country](./rename-a-country.md)
 -   [Change a currency symbol](./change-a-currency-symbol.md)
 -   [Unhook and remove WooCommerce emails](./unhook--remove-woocommerce-emails.md)
+-   [Unhook and remove WooCommerce emails](./unhook--remove-woocommerce-emails.md);
+-   [Adjust the quantity input values](./adjust-quantity-input-values.md)

docs/snippets/adjust-quantity-input-values.md

@@ -0,0 +1,47 @@
+# Adjust the quantity input values
+
+> This is a **Developer level** doc. If you are unfamiliar with code and resolving potential conflicts, select a [WooExpert or Developer](https://woocommerce.com/customizations/) for assistance. We are unable to provide support for customizations under our  [Support Policy](http://www.woocommerce.com/support-policy/).
+
+Set the starting value, maximum value, minimum value, and increment amount for quantity input fields on product pages.
+
+Add this code to your child theme’s `functions.php` file or via a plugin that allows custom functions to be added, such as the [Code snippets](https://wordpress.org/plugins/code-snippets/) plugin. Avoid adding custom code directly to your parent theme’s `functions.php` file, as this will be wiped entirely when you update the theme.
+
+```php
+if ( ! function_exists( 'YOUR_PREFIX_woocommerce_quantity_input_args' ) ) {
+	/**
+	 * Adjust the quantity input values for simple products
+	 */
+	function YOUR_PREFIX_woocommerce_quantity_input_args( $args, $product ) {
+		// Only affect the starting value on product pages, not the cart
+		if ( is_singular( 'product' ) ) {
+			$args['input_value'] = 4;
+		}
+
+		$args['max_value'] 	= 10; // Maximum value
+		$args['min_value'] 	= 2;  // Minimum value
+		$args['step'] 		= 2;  // Quantity steps
+
+		return $args;
+	}
+
+	add_filter( 'woocommerce_quantity_input_args', 'YOUR_PREFIX_woocommerce_quantity_input_args', 10, 2 );
+}
+
+if ( ! function_exists( 'YOUR_PREFIX_woocommerce_available_variation' ) ) {
+	/**
+	 * Adjust the quantity input values for variations
+	 */
+	function YOUR_PREFIX_woocommerce_available_variation( $args ) {
+		$args['max_qty'] = 20; // Maximum value (variations)
+		$args['min_qty'] = 2;  // Minimum value (variations)
+		
+		// Note: the starting value and step for variations is controlled
+		// from the 'woocommerce_quantity_input_args' filter shown above for
+    // simple products
+
+		return $args;
+	}
+
+	add_filter( 'woocommerce_available_variation', 'YOUR_PREFIX_woocommerce_available_variation' );
+}
+```