fix: getGetPost() and getPostGet() when index is null

Author: michalsn

system/HTTP/IncomingRequest.php

@@ -613,6 +613,9 @@ public function getPost($index = null, $filter = null, $flags = null)
      */
     public function getPostGet($index = null, $filter = null, $flags = null)
     {
+        if ($index === null) {
+            return array_merge($this->getGet($index, $filter, $flags), $this->getPost($index, $filter, $flags));
+        }
         // Use $_POST directly here, since filter_has_var only
         // checks the initial POST data, not anything that might
         // have been added since.
@@ -630,6 +633,9 @@ public function getPostGet($index = null, $filter = null, $flags = null)
      */
     public function getGetPost($index = null, $filter = null, $flags = null)
     {
+        if ($index === null) {
+            return array_merge($this->getPost($index, $filter, $flags), $this->getGet($index, $filter, $flags));
+        }
         // Use $_GET directly here, since filter_has_var only
         // checks the initial GET data, not anything that might
         // have been added since.

tests/system/HTTP/IncomingRequestTest.php

@@ -563,6 +563,26 @@ public function testGetPostEmpty()
         $this->assertSame($_GET, $this->request->getGetPost());
     }
 
+    public function testPostGetSecondStream()
+    {
+        $_GET['get'] = '3';
+        $this->assertSame($_GET, $this->request->getPostGet());
+    }
+
+    public function testGetPostSecondStream()
+    {
+        $_POST['post'] = '5';
+        $this->assertSame($_POST, $this->request->getGetPost());
+    }
+
+    public function testGetPostSecondStreams()
+    {
+        $_GET['get']   = '3';
+        $_POST['post'] = '5';
+        $this->assertSame(array_merge($_GET, $_POST), $this->request->getPostGet());
+        $this->assertSame(array_merge($_POST, $_GET), $this->request->getGetPost());
+    }
+
     public function testWithFalseBody()
     {
         // Use `false` here to simulate file_get_contents returning a false value

user_guide_src/source/changelogs/v4.2.8.rst

@@ -36,6 +36,6 @@ none.
 Bugs Fixed
 **********
 
-none.
+- Fixed a bug when the ``CodeIgniter\HTTP\IncomingRequest::getPostGet()`` and ``CodeIgniter\HTTP\IncomingRequest::getGetPost()`` methods didn't return values from the other stream when ``index`` was set to ``null``.
 
 See the repo's `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_ for a complete list of bugs fixed.