Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for jobadu.de.mysql failed: No address associated with hostname in /customers/b/3/a/jobadu.de/httpd.www/zugangsdaten-datenbank.php on line 6

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for jobadu.de.mysql failed: No address associated with hostname in /customers/b/3/a/jobadu.de/httpd.www/zugangsdaten-datenbank.php:6
Stack trace:
#0 /customers/b/3/a/jobadu.de/httpd.www/zugangsdaten-datenbank.php(6): mysqli_connect('jobadu.de.mysql', 'jobadu_de', 'hoyDovZkjjet', 'jobadu_de')
#1 /customers/b/3/a/jobadu.de/httpd.www/zusatz-intro/beruf-desktop.php(6): include('/customers/b/3/...')
#2 /customers/b/3/a/jobadu.de/httpd.www/zusatz-intro/beruf.php(12): include('/customers/b/3/...')
#3 /customers/b/3/a/jobadu.de/httpd.www/beruf/ausbildung-beton-und-stahlbetonbauer.php(4): include('/customers/b/3/...')
#4 {main}
  thrown in /customers/b/3/a/jobadu.de/httpd.www/zugangsdaten-datenbank.php on line 6