3 files changed, 17 insertions, 26 deletions
diff --git a/phpBB/phpbb/db/migration/schema_generator.php b/phpBB/phpbb/db/migration/schema_generator.php
index dc685bb161..c579e25824 100644
--- a/phpBB/phpbb/db/migration/schema_generator.php
+++ b/phpBB/phpbb/db/migration/schema_generator.php
@@ -79,8 +79,7 @@ class schema_generator
 		{
 			foreach ($migrations as $key => $migration_class)
 			{
-				// Unset classes that do not exist or do not extend the
-				// abstract class phpbb\db\migration\migration
+				// Unset classes that are not a valid migration
 				if (\phpbb\db\migrator::is_migration($migration_class) === false)
 				{
 					unset($migrations[$key]);
diff --git a/phpBB/phpbb/db/migrator.php b/phpBB/phpbb/db/migrator.php
index 563958b258..2f280ec5a5 100644
--- a/phpBB/phpbb/db/migrator.php
+++ b/phpBB/phpbb/db/migrator.php
@@ -861,31 +861,16 @@ class migrator
 	/**
 	 * Check if a class is a migration.
 	 *
-	 * @param mixed $migration An array of migration name strings, or
-	 *                         a single migration name string.
-	 * @return bool Returns true or false for a single migration.
-	 *              If an array was received, non-migrations will
-	 *              be removed from the array, and false is returned.
+	 * @param string $migration A migration class name
+	 * @return bool Return true if class is a migration, false otherwise
 	 */
-	static public function is_migration(&$migration)
+	static public function is_migration($migration)
 	{
-		if (is_array($migration))
-		{
-			foreach ($migration as $key => $name)
-			{
-				if (self::is_migration($name))
-				{
-					continue;
-				}
-
-				unset($migration[$key]);
-			}
-		}
-		else if (class_exists($migration))
+		if (class_exists($migration))
 		{
 			// Migration classes should extend the abstract class
-			// phpbb\db\migration\migration which implements the
-			// migration_interface and be instantiable.
+			// phpbb\db\migration\migration (which implements the
+			// migration_interface) and be instantiable.
 			$reflector = new \ReflectionClass($migration);
 			if ($reflector->implementsInterface('\phpbb\db\migration\migration_interface') && $reflector->isInstantiable())
 			{
diff --git a/phpBB/phpbb/extension/base.php b/phpBB/phpbb/extension/base.php
index b05c1af8d4..abdb10df88 100644
--- a/phpBB/phpbb/extension/base.php
+++ b/phpBB/phpbb/extension/base.php
@@ -137,9 +137,16 @@ class base implements \phpbb\extension\extension_interface
 
 		$migrations = $this->extension_finder->get_classes_from_files($migrations);
 
-		// Unset classes that do not exist or do not extend the
-		// abstract class phpbb\db\migration\migration
-		\phpbb\db\migrator::is_migration($migrations);
+		// Unset classes that are not a valid migration
+		foreach ($migrations as $key => $migration)
+		{
+			if (\phpbb\db\migrator::is_migration($migration) === true)
+			{
+				continue;
+ 			}
+
+ 			unset($migrations[$key]);
+ 		}
 
 		return $migrations;
 	}