From b679783fb834f6736c2edc415cf40056150cdcdf Mon Sep 17 00:00:00 2001
From: Benjamin Renard <brenard@easter-eggs.com>
Date: Wed, 1 Mar 2023 11:23:48 +0100
Subject: [PATCH] Add App::keys() method

---
 src/App.php | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/App.php b/src/App.php
index 19a043a..0116083 100644
--- a/src/App.php
+++ b/src/App.php
@@ -150,6 +150,18 @@ class App {
     );
   }
 
+  /**
+   * Get list of keys of a specific option
+   *
+   * @param string $key The configuration variable key
+   *
+   * @return array An array of the keys of a specific option
+   **/
+  public static function keys($key) {
+    $value = self :: get($key);
+    return (is_array($value)?array_keys($value):array());
+  }
+
   /**
    * Set a specific option value
    *