WooCommerce Pdf Vouchers - Create custom shortcode for display order item meta download PDF

woo_vou_pdf_order_items_meta_shortcodes.php

<?php

/**
 * Adding order meta value to the Custom shortcode in PDF voucher
 */
 
 function woo_vou_pdf_order_items_meta_shortcodes( $voucher_template_html, $orderid, $item_key, $items, $voucodes, $productid) {

		$hidden_order_itemmeta = apply_filters( 'woocommerce_hidden_order_itemmeta', array(
				'_qty',
				'_tax_class',
				'_product_id',
				'_variation_id',
				'_line_subtotal',
				'_line_subtotal_tax',
				'_line_total',
				'_line_tax',
				'method_id',
				'cost',
			)
		);

		$html = '';

		if ( !empty( $items ) ){

			$html = '<table cellspacing="0" style="width:100%;">';

				foreach ( $items as $i_key => $item ) {
					if( $item_key != $i_key )
						continue;
					
					if( $meta_data = $item->get_formatted_meta_data( '' ) ){

						foreach ( $meta_data as $meta_id => $meta ) { 

							if ( in_array( $meta->key, $hidden_order_itemmeta, true ) ) {
								continue;
							}

							$html .= '<tr>
								<td><strong>'.wp_kses_post( $meta->display_key ) .':</strong> '. wp_strip_all_tags ($meta->display_value) .'</td></tr>';
						}
					}
				}
			$html .= '</table>';
		}

		$voucher_template_html = str_replace( '{order_items_meta}', $html, $voucher_template_html );
		
		return $voucher_template_html;
}

// Add filter to replace voucher template shortcodes in download pdf
add_filter('woo_vou_pdf_template_inner_html', 'woo_vou_pdf_order_items_meta_shortcodes', 10, 6 );