WhatsApp Chat WooCommerce - https://solusipress.com/menambahkan-form-kontak-whatsapp-pada-halaman-produk-woocommerce/

snippet-1.php

<?php

add_action( 'init', 'sp_woocommerce_contact_form' );
function sp_woocommerce_contact_form() {	
	if( !is_admin() ) {
		include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
		if( is_plugin_active( 'woocommerce/woocommerce.php' ) ) {
			add_action( 'woocommerce_after_add_to_cart_button', 'sp_woo_add_contact_form_wa' );	
		}
	}	
}

function sp_woo_add_contact_form_wa() {
		
	global $product;
	$name = $product->get_name();
	$sku = $product->get_sku();
	
	$purpose = 'Ingin bertanya untuk produk ' . $name . ' (SKU: ' . $sku . ')';
	echo '<div style="margin-top: 20px">';
	echo do_shortcode( '[sp_contact_wa phone="6281314997198" form_title="Pre-Sales Question" columns="5,4,3" purpose="' .$purpose. '"]' );
	echo '</div>';	
}