added example for PHP filters

@see https://wordpress.org/support/topic/example-extending-functionality-with-php/

examples/filters.php

@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * Set swiper options on a per-block instance basis
+ * based on a custom className
+ */
+add_filter('good-slider/swiper-options', function ($swiperOptions, $blockAttributes) {
+    if (!empty($blockAttributes['className']) && str_contains($blockAttributes['className'], 'is-style-news-slider')) {
+        return [
+            'slidesPerView' => 1,
+            'spaceBetween' => 20,
+            'pagination' => true,
+            'navigation' => false,
+            'createElements' => true,
+            'loop' => true,
+            'breakpoints' => [
+                '1024' => [
+                    'pagination' => false,
+                ]
+            ]
+        ];
+    }
+    return $swiperOptions;
+}, 10, 2);

readme.txt

@@ -50,6 +50,8 @@ We recommend installing the plugin extension through the WordPress Backend.
 The UI currently allows for enabling/disabling navigation and pagination and the desktops default number of slides per view.
 
 You can use the `good-slider/swiper-options` filter hook to set the swiper configuration for a specific block instance.
+Have a look at the [examples on GitHub](https://github.com/goodwp/good-slider/tree/main/examples/filters.php).
+
 All the available arguments are documented in the [Swiper v8 documentation](https://v8.swiperjs.com/swiper-api).
 
 = Can I use my own enqueued Swiper script? =