database connection issue with PHP : Issue Is with the database connection for a open source Project(php).
Everything works fine apart from the database connection required for login.Following is the error that can be seen after login.

Warning: require_once(../mysqli_connect.php): failed to open stream: No such file or directory in /Applications/XAMPP/xamppfiles/htdocs/airline-ticket-reservation-system-master/login_handler.php on line 44

Fatal error: require_once(): Failed opening required '../mysqli_connect.php' (include_path='.:/Applications/XAMPP/xamppfiles/lib/php') in /Applications/XAMPP/xamppfiles/htdocs/airline-ticket-reservation-system-master/login_handler.php on line 44


mysqli_connect.php
`````````````````````





<?php
DEFINE('DB_USER','Harry');
DEFINE('DB_PASSWORD','passpasshello');
DEFINE('DB_HOST','localhost');
DEFINE('DB_NAME','airline_reservation');

$dbc=mysqli_connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME)
OR dies('Could not connect to MySQL:' .
	mysqli_connect_error());
?>[enter image description here][1]


  [1]: https://i.stack.imgur.com/PK1gA.jpg