woocommerce_in_plugin_update_message │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_in_plugin_update_message', 'wp_kama_woocommerce_in_plugin_update_message_filter' );

/**
 * Function for `woocommerce_in_plugin_update_message` filter-hook.
 * 
 * @param  $html 
 *
 * @return 
 */
function wp_kama_woocommerce_in_plugin_update_message_filter( $html ){

	// filter...
	return $html;
}

$html

-

Where the hook is called

echo apply_filters( 'woocommerce_in_plugin_update_message', $this->upgrade_notice ? '</p>' . wp_kses_post( $this->upgrade_notice ) . '<p class="dummy">' : '' ); // phpcs:ignore WordPress.XSS.EscapeOutput.OutputNotEscaped

Where the hook is used in WooCommerce