maysqli_connect_error() code example
Example: mysqli connect error
<?php
$conn=mysqli_connect("localhost","username","password","database_name");
?>
This code will connect with database 'database_name' while $conn is connection name
<?php
$conn=mysqli_connect("localhost","username","password","database_name");
?>
This code will connect with database 'database_name' while $conn is connection name