+ strpos($_SERVER['HTTP_USER_AGENT'], 'TurnitinBot/2.1') !== false ||
+ strpos($_SERVER['HTTP_USER_AGENT'], 'CligooRobot/1.0') !== false ||
+ strpos($_SERVER['HTTP_USER_AGENT'], 'libwww-perl') !== false ||
+ strpos($_SERVER['HTTP_USER_AGENT'], 'Wget') !== false ||
+ strpos($_SERVER['HTTP_USER_AGENT'], 'Python-urllib') !== false ||