Fix Metabox Loop and Prefix Custom Post Types

### Fixed
- Metabox loop now continues to next post type instead of immediately exiting process.
- Custom Post Types are now properly prefixed and checked on save.

CHANGELOG.md

@@ -27,6 +27,8 @@ This is NOT the changelog of the WordPress Plugin you ultimately develop!
 ### Fixed
 - Incorrect author information in several files.
 - Require `wp-admin/includes/file.php` if WP_Filesystem is unavailable.
+- Save Metabox loop now continues to next post type instead of immediately exiting process.
+- Custom Post Types are now properly prefixed and checked on save.
 
 ## [v5-alpha] - 2024-05-26
 

src/src/registerables/metaboxes/class-base-metabox.php

@@ -286,7 +286,7 @@ public function save_custom_post_meta_box_data( int $post_id = 0 ): void {
 				|| $post_type !== $_POST['post_type']
 				|| ! current_user_can( 'edit_post', $post_id )
 			) {
-				return;
+				continue;
 			}
 
 			if ( isset( $_POST[ $this->get_key() ] ) ) {

src/src/registerables/metaboxes/class-example-metabox.php

@@ -66,7 +66,7 @@ class Example_Metabox extends Base_Metabox {
 	 */
 	protected function initialize_properties(): void {
 
-		$this->post_types = array( 'post', 'page', 'item' );
+		$this->post_types = array( 'post', 'page', Config::get( 'slug' ) . '-item' );
 		$this->context    = array(
 			'post' => 'side',
 			'page' => 'normal',