Warning: mysqli_connect(): php_network_getaddresses: getaddrinfo for z40w808w80s8cckow00wo4cc failed: Temporary failure in name resolution in /var/www/html/config/connection.php on line 21

Fatal error: Uncaught mysqli_sql_exception: php_network_getaddresses: getaddrinfo for z40w808w80s8cckow00wo4cc failed: Temporary failure in name resolution in /var/www/html/config/connection.php:21 Stack trace: #0 /var/www/html/config/connection.php(21): mysqli_connect('z40w808w80s8cck...', 'mysql', Object(SensitiveParameterValue), 'default', 3306) #1 /var/www/html/blog.php(115): include('/var/www/html/c...') #2 {main} thrown in /var/www/html/config/connection.php on line 21