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diff --git a/web/modules/contrib/drupalmoduleupgrader/src/Plugin/DMU/Analyzer/HookFormAlter.php b/web/modules/contrib/drupalmoduleupgrader/src/Plugin/DMU/Analyzer/HookFormAlter.php
new file mode 100644
index 000000000..bfcea8a95
--- /dev/null
+++ b/web/modules/contrib/drupalmoduleupgrader/src/Plugin/DMU/Analyzer/HookFormAlter.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Drupal\drupalmoduleupgrader\Plugin\DMU\Analyzer;
+
+use Drupal\drupalmoduleupgrader\AnalyzerBase;
+use Drupal\drupalmoduleupgrader\TargetInterface;
+use Pharborist\Filter;
+use Pharborist\Functions\FunctionDeclarationNode;
+
+/**
+ * @Analyzer(
+ *  id = "hook_form_alter",
+ *  description = @Translation("Checks for outdated hook_form_alter() implementations."),
+ *  documentation = {
+ *    {
+ *      "url" = "https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Form%21form.api.php/function/hook_form_alter/8",
+ *      "title" = @Translation("`hook_form_alter()` documentation")
+ *    }
+ *  },
+ *  tags = {
+ *    "category" = { "form" }
+ *  },
+ *  message = @Translation("The signature of hook_form_alter() has changed in Drupal 8.")
+ * )
+ */
+class HookFormAlter extends AnalyzerBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function analyze(TargetInterface $target) {
+    $violations = [];
+
+    $indexer = $target->getIndexer('function');
+    if ($indexer->has('hook_form_alter')) {
+      $violations[] = $indexer->get('hook_form_alter');
+    }
+
+    $id = $target->id() . '_form_%_alter';
+    // Until kernel tests are run in PHPUnit, we need to check for
+    // the existence of db_like().
+    if (function_exists('db_like')) {
+      $id = db_like($id);
+    }
+    $alter_hooks = $target
+      ->getIndexer('function')
+      ->getQuery()
+      ->condition('id', $id, 'LIKE')
+      ->execute();
+
+    foreach ($alter_hooks as $alter_hook) {
+      $violations[] = $target
+        ->open($alter_hook->file)
+        ->find(Filter::isFunction($alter_hook->id));
+    }
+
+    $issues = [];
+
+    if ($violations) {
+      $issue = $this->buildIssue($target);
+      array_walk($violations, function(FunctionDeclarationNode $function) use ($issue) {
+        $issue->addViolation($function, $this);
+      });
+      $issues[] = $issue;
+    }
+
+    return $issues;
+  }
+
+}