Description:
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sir, i am new user of PHP. i need to open a database in MySQL using new mysqli(). But my web page is blank if i run that program since the user name and password is not given. i need to know if root is the user what should be in user name and what should be in password column.

Reproduce code:
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<?php
@ $db=new mysqli('localhost','','','hotel');
if (mysqli_connect_errno())
{
  echo 'Error:could not connect to db';
  
}
$pid=1;
$pln='ap';
$sgl=300.00;
$dbl=600.00;
$dlflg=0;
$qry="insert into plan values(".$pid.",'".$pln."',".$sgl.",".$dbl.",".$dlflg.")";
$result=$db->query($qry);
if( $result)
  echo 'inserted';
?>

Expected result:
----------------
I need to see that the querry is inserted.

Actual result:
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i debugged the program when line 2 is executed the control transfers some where.