simple max quantity for certain categories | woocommerce

woo-max-quantities.php

<?php 

// add maximum quantity for cafe pickup items

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

function lg_woocommerce_quantity_input_args( $args, $product ) {

	if ( has_term( 'pastries', 'product_cat' ) || has_term( 'case', 'product_cat' ) || has_term( 'lunch', 'product_cat' ) ) {

		$args['input_value'] 	= 1;	// Starting value (we only want to affect product pages, not cart)
		$args['max_value'] 	= 10;   	// Maximum value (we want people to use catering to buy more than 10)
	
		if ( $product->managing_stock() && ! $product->backorders_allowed() ) {
			$stock = $product->get_stock_quantity();
			// Limit our max by the available stock, if stock is lower
			// Set to lessor of stock qty or max allowed
			$args['max_value'] = min( $stock, $args['max_value'] );

		}
	}

	return $args;
}

?>