Fix remaining issues: revert to snake_case for PHP methods, update WordPress Playground CLI command

.github/workflows/playground-tests.yml

@@ -65,7 +65,7 @@ jobs:
     - name: Run tests with WordPress Playground
       run: |
         # Start WordPress Playground with our blueprint
-        npx @wp-playground/cli start --blueprint playground/blueprint.json --port 8888 &
+        npx @wp-playground/cli server --blueprint playground/blueprint.json --port 8888 --login &
 
         # Wait for WordPress Playground to be ready
         echo "Waiting for WordPress Playground to be ready..."

includes/Multisite/class-multisite.php

@@ -36,7 +36,7 @@ class Multisite {
      *
      * @return bool Always returns true.
      */
-    public function isMultisiteCompatible() {
+    public function is_multisite_compatible() {
         return true;
     }
 
@@ -45,7 +45,7 @@ class Multisite {
      *
      * @return array An empty array as this is just a placeholder.
      */
-    public function getNetworkSites() {
+    public function get_network_sites() {
         // This is just a placeholder method.
         // In a real implementation, you might use get_sites() or a custom query.
         return function_exists( 'get_sites' ) ? get_sites( array( 'public' => 1 ) ) : array();

includes/class-plugin.php

@@ -83,7 +83,7 @@ class Plugin {
      *
      * @return string The plugin version.
      */
-    public function getVersion(): string {
+    public function get_version(): string {
         return $this->version;
     }
 
@@ -92,7 +92,7 @@ class Plugin {
      *
      * @return Admin The admin instance.
      */
-    public function getAdmin(): Admin {
+    public function get_admin(): Admin {
         return $this->admin;
     }
 }