diff --git a/.gitattributes b/.gitattributes
index 84c7add..14c3c35 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,4 +1,3 @@
 /Tests export-ignore
 /phpunit.xml.dist export-ignore
-/.gitattributes export-ignore
-/.gitignore export-ignore
+/.git* export-ignore
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..4689c4d
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,8 @@
+Please do not submit any Pull Requests here. They will be closed.
+---
+
+Please submit your PR here instead:
+https://github.com/symfony/symfony
+
+This repository is what we call a "subtree split": a read-only subset of that main repository.
+We're looking forward to your PR there!
diff --git a/.github/workflows/close-pull-request.yml b/.github/workflows/close-pull-request.yml
new file mode 100644
index 0000000..e55b478
--- /dev/null
+++ b/.github/workflows/close-pull-request.yml
@@ -0,0 +1,20 @@
+name: Close Pull Request
+
+on:
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: superbrothers/close-pull-request@v3
+      with:
+        comment: |
+          Thanks for your Pull Request! We love contributions.
+
+          However, you should instead open your PR on the main repository:
+          https://github.com/symfony/symfony
+
+          This repository is what we call a "subtree split": a read-only subset of that main repository.
+          We're looking forward to your PR there!
diff --git a/AbstractUriElement.php b/AbstractUriElement.php
index d75dcd2..55c71d6 100644
--- a/AbstractUriElement.php
+++ b/AbstractUriElement.php
@@ -35,7 +35,7 @@ public function __construct(\DOMElement $node, ?string $currentUri = null, ?stri
         $this->method = $method ? strtoupper($method) : null;
         $this->currentUri = $currentUri;
 
-        $elementUriIsRelative = null === parse_url(trim($this->getRawUri()), \PHP_URL_SCHEME);
+        $elementUriIsRelative = !parse_url(trim($this->getRawUri()), \PHP_URL_SCHEME);
         $baseUriIsAbsolute = null !== $this->currentUri && \in_array(strtolower(substr($this->currentUri, 0, 4)), ['http', 'file']);
         if ($elementUriIsRelative && !$baseUriIsAbsolute) {
             throw new \InvalidArgumentException(sprintf('The URL of the element is relative, so you must define its base URI passing an absolute URL to the constructor of the "%s" class ("%s" was passed).', __CLASS__, $this->currentUri));
diff --git a/Form.php b/Form.php
index bd3b2ea..a634d05 100644
--- a/Form.php
+++ b/Form.php
@@ -180,9 +180,8 @@ public function getUri(): string
         $uri = parent::getUri();
 
         if (!\in_array($this->getMethod(), ['POST', 'PUT', 'DELETE', 'PATCH'])) {
-            $query = parse_url($uri, \PHP_URL_QUERY);
             $currentParameters = [];
-            if ($query) {
+            if ($query = parse_url($uri, \PHP_URL_QUERY)) {
                 parse_str($query, $currentParameters);
             }