3 files changed, 20 insertions, 10 deletions
diff --git a/phpBB/includes/acp/acp_extensions.php b/phpBB/includes/acp/acp_extensions.php
index 2929de3c4f..da03b576bf 100644
--- a/phpBB/includes/acp/acp_extensions.php
+++ b/phpBB/includes/acp/acp_extensions.php
@@ -172,10 +172,8 @@ class acp_extensions
 				}
 
 				$extension = $this->ext_manager->get_extension($ext_name);
-				if (!$extension->is_enableable())
-				{
-					trigger_error($this->user->lang['EXTENSION_NOT_ENABLEABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
-				}
+
+				$this->check_is_enableable($extension->is_enableable());
 
 				if ($this->ext_manager->is_enabled($ext_name))
 				{
@@ -209,10 +207,8 @@ class acp_extensions
 				}
 
 				$extension = $this->ext_manager->get_extension($ext_name);
-				if (!$extension->is_enableable())
-				{
-					trigger_error($this->user->lang['EXTENSION_NOT_ENABLEABLE'] . adm_back_link($this->u_action), E_USER_WARNING);
-				}
+
+				$this->check_is_enableable($extension->is_enableable());
 
 				try
 				{
@@ -727,4 +723,14 @@ class acp_extensions
 			));
 		}
 	}
+
+	protected function check_is_enableable($enableable)
+	{
+		if ($enableable !== true)
+		{
+			$message = !empty($enableable) ? $enableable : $this->user->lang('EXTENSION_NOT_ENABLEABLE');
+			$message = is_array($message) ? implode('<br />', $message) : $message;
+			trigger_error($message . adm_back_link($this->u_action), E_USER_WARNING);
+		}
+	}
 }
diff --git a/phpBB/phpbb/console/command/extension/enable.php b/phpBB/phpbb/console/command/extension/enable.php
index a6f5b10e86..f007009aa0 100644
--- a/phpBB/phpbb/console/command/extension/enable.php
+++ b/phpBB/phpbb/console/command/extension/enable.php
@@ -69,7 +69,10 @@ class enable extends command
 		}
 		else
 		{
-			$io->error($this->user->lang('CLI_EXTENSION_ENABLE_FAILURE', $name));
+			$enableable = $this->manager->get_extension($name)->is_enableable();
+			$message = !empty($enableable) ? $enableable : $this->user->lang('CLI_EXTENSION_ENABLE_FAILURE');
+			$message = is_array($message) ? implode(PHP_EOL, $message) : $message;
+			$io->error($message, $name);
 			return 1;
 		}
 	}
diff --git a/phpBB/phpbb/extension/extension_interface.php b/phpBB/phpbb/extension/extension_interface.php
index 6a6b6adb8f..46072d420c 100644
--- a/phpBB/phpbb/extension/extension_interface.php
+++ b/phpBB/phpbb/extension/extension_interface.php
@@ -22,7 +22,8 @@ interface extension_interface
 	/**
 	* Indicate whether or not the extension can be enabled.
 	*
-	* @return bool
+	* @return bool|array	True if extension is enableable, array of reasons
+	*						if not, false for generic reason.
 	*/
 	public function is_enableable();