Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for mysql failed: Name or service not known in /var/www/acc/lib/mysql_wrapper.inc.php on line 53

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for mysql failed: Name or service not known in /var/www/acc/lib/mysql_wrapper.inc.php:53 Stack trace: #0 /var/www/acc/lib/mysql_wrapper.inc.php(53): mysqli_connect('mysql', 'alex', Object(SensitiveParameterValue)) #1 /var/www/acc/inccon.php(8): mysql_connect('mysql', 'alex', 'alex', true) #2 /var/www/acc/inc/header.inc.php(12): include('/var/www/acc/in...') #3 /var/www/acc/index.php(3): include_once('/var/www/acc/in...') #4 {main} thrown in /var/www/acc/lib/mysql_wrapper.inc.php on line 53