Custom product titles

Hi @frank0080,

Although it is possible to customize the item titles on the PDF invoice, it is not complete clear to me what you want to achieve, so here are some questions for you, so I can understand better and provide you with accurate advice:

• Do you want to set custom names for the PDF documents manually, for each product in your inventory? This would be easier, but you would need to set the names one by one for each product, which could be exhausting if you have a lot of products.
• If the answer to the previous question is «No»: Could you please explain what would be the logic to rename the items? Maybe are you using a common pattern for the SEO titles that can be overridden or get rid with a regex, or a similar approach?

Thanks for providing more details, @frank0080:

To customize the item names, you can use the woocommerce_order_item_name filter hook, using $item to get the product ID and override the item name.

Actually, I went ahead and write the following code snippet for you:

/**
 * PDF Invoices & Packing Slips for WooCommerce:
 * Set custom names for the specific items in the PDF Invoices
 */ 
add_filter( 'wpo_wcpdf_html_filters', function( $filters, $document ) {
	if ( 'invoice' === $document->get_type() ) {
		$filters[] = array( 'woocommerce_order_item_name', 'wpo_wcpdf_custom_item_names', 999, 2 );
	}
	return $filters;
}, 10, 2 );
function wpo_wcpdf_custom_item_names( $item_name, $item ) {
	if ( $product = $item->get_product() ) {
		// Set the product IDs and custom names below,
		// with the following patter: 'product ID' => 'Custom name'
		$custom_product_names = array(
			'123' => 'Product Title 1',
			'456' => 'Product Title 2',
			'789' => 'Product Title 3',
		);
		
		foreach ( $custom_product_names as $product_id => $custom_name ) {
			if ( $product->get_id() === $product_id ) {
				$item_name = $custom_name;
			}
		}
	}
	return $item_name;
}

You only have to replace the product IDs with the actual ones, and set your custom names for each of them.