使用mysqli_query在php中读取列不起作用

Question

So I'm trying to read from an SQL file where I have a table:

CREATE TABLE IF NOT EXISTS `tariff` (
    `type` varchar(50) NOT NULL DEFAULT '',
    `price_single` varchar(30) NOT NULL DEFAULT '0',
    `price_double` varchar(30) NOT NULL DEFAULT '0',
    `totalroom` int(3) NOT NULL DEFAULT '0',
    primary key(`type`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

and I inserted:

INSERT INTO `tariff` (`type`, `price_single`, `price_double`, `totalroom`) VALUES
('Standard', '2600', '3100', 100),
('Deluxe', '3100', '4200', 50),
('Super Deluxe', '3800', '4600', 15);

next I have :

<?php
$server = "localhost";
$unm = "root";
$pwd = "root";
$db = "hotel";
$con = mysqli_connect($server, $unm, $pwd, $db);
$qrysel = "select * from tariff";
$rs = mysqli_query($con, $qrysel);

if (!$rs) {
    echo "here it stops";
    die($qrysel);
}

while ($v = mysqli_fetch_array($rs)) {
    echo "<tr>";
        echo "<td>".$v['type']."</td>";
        echo "<td>".$v[1]."</td>";
        echo "<td>".$v[2]."</td>";
        echo "<td>".$v[3]."</td>";
    echo "</tr>";
}
echo "</table>";

?>

I don't know where is the problem. I'm trying to output what I have done in the insert in the SQL file but it goes into the if-statement and there it stops.

Answer 1

Your Query looks just fine what i assume is there is an error while connecting to database you should first do some error handling to see whether it is connecting to the database or not here's a solution for error handling in db connectivity

$server="localhost";
        $unm="root";
        $pwd="root";
        $db="hotel";
        $con=mysqli_connect($server,$unm,$pwd,$db);

if (!$con){
die('Could not connect: ' . mysqli_connect_error($con));
}

if there is a database error i recommend using the following credentials

$server="localhost";
        $unm="root";
        $pwd="";
        $db="hotel";
        $con=mysqli_connect($server,$unm,$pwd,$db);
if (!$con){
die('Could not connect: ' . mysqli_connect_error($con));
}

Answer 2

First try to check the connection:

if (mysqli_connect_errno()) {
printf("Error: %s\n", mysqli_connect_error());
exit();
}