[ticket/12602] Add function get_tasks.

PHPBB3-12602

phpBB/phpbb/cron/manager.php

@@ -121,6 +121,21 @@ class manager
 		return null;
 	}
 
+	/**
+	* Find all tasks and return them.
+	*
+	* @return array List of all tasks.
+	*/
+	public function get_tasks()
+	{
+		$tasks = array();
+		foreach ($this->tasks as $task)
+		{
+			$tasks[] = $task;
+		}
+		return $tasks;
+	}
+
 	/**
 	* Wraps a task inside an instance of \phpbb\cron\task\wrapper.
 	*