Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for hainaut.org.mysql failed: Name or service not known in /customers/c/6/7/ced5aaojz/webroots/www/inscriptET.inc.php on line 8

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for hainaut.org.mysql failed: Name or service not known in /customers/c/6/7/ced5aaojz/webroots/www/inscriptET.inc.php:8
Stack trace:
#0 /customers/c/6/7/ced5aaojz/webroots/www/inscriptET.inc.php(8): mysqli_connect('hainaut.org.mys...', 'hainaut_org_hpc', Object(SensitiveParameterValue), 'hainaut_org_hpc')
#1 /customers/c/6/7/ced5aaojz/webroots/www/inscription.php(2): include('/customers/c/6/...')
#2 {main}
  thrown in /customers/c/6/7/ced5aaojz/webroots/www/inscriptET.inc.php on line 8