Fatal error: Uncaught exception Error with message Call to undefined function mysql_connect() thrown in /homepages/22/d357853275/htdocs/contao2015/system/drivers/DB_Mysql.php on line 74

#0 /homepages/22/d357853275/htdocs/contao2015/system/libraries/Database.php(74): DB_Mysql->connect()
#1 /homepages/22/d357853275/htdocs/contao2015/system/libraries/Database.php(135): Database->__construct()
#2 /homepages/22/d357853275/htdocs/contao2015/system/libraries/System.php(176): Database::getInstance()
#3 /homepages/22/d357853275/htdocs/contao2015/system/libraries/Model.php(86): System->import('Database')
#4 /homepages/22/d357853275/htdocs/contao2015/system/modules/frontend/FrontendUser.php(91): Model->__construct()
#5 /homepages/22/d357853275/htdocs/contao2015/system/modules/frontend/FrontendUser.php(173): FrontendUser->__construct()
#6 /homepages/22/d357853275/htdocs/contao2015/system/libraries/System.php(176): FrontendUser::getInstance()
#7 /homepages/22/d357853275/htdocs/contao2015/index.php(65): System->import('FrontendUser', 'User')
#8 /homepages/22/d357853275/htdocs/contao2015/index.php(400): Index->__construct()
#9 {main}