Added: check for WordPress Playground

README.txt

@@ -3,7 +3,7 @@ Contributors: equalizedigital, alh0319, stevejonesdev
 Tags: accessibility, accessible, wcag, ada, WP accessibility, section 508, aoda, a11y, audit, readability, content analysis
 Requires at least: 5.0.0
 Tested up to: 6.3.1
-Stable tag: 1.6.1
+Stable tag: 1.6.2
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -171,6 +171,9 @@ No, Accessibility Checker runs completely on your server and does not require yo
 
 == Changelog ==
 
+= 1.6.2 =
+Added: check for WordPress Playground
+
 = 1.6.1 =
 Updated: passed percentage calculation
 Updated: frontend highlighting disable styles to be compatible with optimization plugins

accessibility-checker.php

@@ -10,7 +10,7 @@
  * Plugin Name:       Accessibility Checker
  * Plugin URI:        https://a11ychecker.com
  * Description:       Audit and check your website for accessibility before you hit publish. In-post accessibility scanner and guidance.
- * Version:           1.6.1
+ * Version:           1.6.2
  * Author:            Equalize Digital
  * Author URI:        https://equalizedigital.com
  * License:           GPL-2.0+
@@ -24,6 +24,13 @@
 	die;
 }
 
+// Check for WordPress Playground.
+require_once plugin_dir_path( __FILE__ ) . 'includes/classes/class-playground-check.php';
+$plugin_check = new EDAC\Playground_Check();
+if ( ! $plugin_check->should_load ) {
+    return;
+}
+
 // Include plugin dependency.
 require_once ABSPATH . 'wp-admin/includes/plugin.php';
 
@@ -38,7 +45,7 @@
 
 // Current plugin version.
 if ( ! defined( 'EDAC_VERSION' ) ) {
-	define( 'EDAC_VERSION', '1.6.1' );
+	define( 'EDAC_VERSION', '1.6.2' );
 }
 
 // Current database version.

includes/classes/class-playground-check.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * Class file for Plugin Check
+ * 
+ * @package Accessibility_Checker
+ */
+
+namespace EDAC;
+
+class Playground_Check {
+
+    public $should_load = true;
+
+    /**
+     * Initialize the class and set its properties.
+     */
+    public function __construct() {
+        $this->check_site_url_and_maybe_exit();
+    }
+
+    /**
+     * Check the site's URL and set the should_load property accordingly.
+     */
+    private function check_site_url_and_maybe_exit() {
+        $site_url = get_site_url();
+
+        if ( strpos( $site_url, 'playground.wordpress.net' ) !== false ) {
+            // This is the playground site, show an admin notice.
+            add_action( 'admin_notices', array( $this, 'show_playground_notice' ) );
+
+            // Set should_load to false.
+            $this->should_load = false;
+        }
+    }
+
+    /**
+     * Display an admin notice for the playground site.
+     */
+    public function show_playground_notice() {
+        ?>
+        <div class="notice notice-error">
+            <p><?php esc_html_e( 'Unable to load live preview. WordPress Playground is not compatible with the Accessibility Checker Plugin.', 'accessibility-checker' ); ?></p>
+        </div>
+        <?php
+    }
+}