ERROR [2] mysqli_connect(): (HY000/2002): Connection refused

  Fatal error in line 9 of file /var/lib/security/moving_minisito/includes/mysql_lib.php, PHP 7.3.33 (Linux)

This is the debug trace



Fatal error:  Uncaught Error: Call to undefined function ereg_replace() in /var/lib/security/moving_minisito/includes/inc_error_handler.php:80
Stack trace:
#0 /var/lib/security/moving_minisito/includes/inc_error_handler.php(93): print_debug_info(2, 'mysqli_connect(...', '/var/lib/securi...', 9, Array)
#1 [internal function]: myErrorHandler(2, 'mysqli_connect(...', '/var/lib/securi...', 9, Array)
#2 /var/lib/security/moving_minisito/includes/mysql_lib.php(9): mysqli_connect('localhost', 'movingdb_usr', 'M2+y5gg9-csim26...', 'moving_2025_db')
#3 /var/lib/security/moving_minisito/r_index.php(11): db_connect('localhost', 'moving_2025_db', 'movingdb_usr', 'M2+y5gg9-csim26...')
#4 /var/www/vhosts/residenceitaca.com/httpdocs/r_index.php(1): include('/var/lib/securi...')
#5 {main}
  thrown in /var/lib/security/moving_minisito/includes/inc_error_handler.php on line 80