docs: add note in case you cannot use spark command

Author: kenjis

user_guide_src/source/installation/running.rst

@@ -81,16 +81,40 @@ Checking PHP ini Settings
 
 .. versionadded:: 4.5.0
 
-PHP ini settings change the behaviors of PHP. CodeIgniter provides a command to
+`PHP ini settings`_ change the behaviors of PHP. CodeIgniter provides a command to
 check important PHP settings.
 
+.. _PHP ini settings: https://www.php.net/manual/en/ini.list.php
+
 .. code-block:: console
 
     php spark phpini:check
 
 The *Recommended* column shows the recommended values for production environment.
 They may differ in development environments.
 
+.. note::
+    If you cannot use the spark command, you can use ``CheckPhpIni::run(false)``
+    in your controller.
+
+    E.g.,
+
+    .. code-block:: php
+
+        <?php
+
+        namespace App\Controllers;
+
+        use CodeIgniter\Security\CheckPhpIni;
+
+        class Home extends BaseController
+        {
+            public function index(): string
+            {
+                return CheckPhpIni::run(false);
+            }
+        }
+
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