Plugins: Restric direct access to Hello Dolly PHP file.

This changeset restricts direct access call to `/wp-content/plugins/hello.php`, and removes the "Uncaught exception Error" warning that shows when `WP_DEBUG` is enabled and when accessing the related file directly.

Props deepakrohilla, SergeyBiryukov, szepeviktor, audrasjb.
Fixes #61214.



git-svn-id: https://develop.svn.wordpress.org/trunk@59943 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/plugins/hello.php

@@ -12,6 +12,11 @@ Version: 1.7.2
 Author URI: http://ma.tt/
 */
 
+// Do not load directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	die();
+}
+
 function hello_dolly_get_lyric() {
 	/** These are the lyrics to Hello Dolly */
 	$lyrics = "Hello, Dolly