MySQL query finds rows but returns nothing - php

Question

I have a 2-column table which I create like this (each user has a table for himself):
$sql = "CREATE TABLE $user_name (
driver TINYTEXT NOT NULL,
reg_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)";
I have (manually, using phpMyAdmin) inserted data into one such a table. reg_date was set at current time and some random string (numerical, say 01234) was inserted.
I try accessing the rows like this:
$mysql_qry2 = "SELECT * FROM $username";
$result2 = mysqli_query($conn, $mysql_qry2);
$ans = "";
if(mysqli_num_rows($result2) > 0) {
while ($row = mysqli_fetch_assoc($result2)) {
$ans = $ans . $row["driver"];
$ans = $ans . " ";
$x = $row["driver"];
echo "$x";
echo "a";
}
$ans = $ans . "asd";
echo "$ans";
} else {
echo "b";
}
edit: after fixing my mistaken variable name, the "SELECT *" query is returning zero rows despite 3 rows of data being there.

Answer 1

You checked count of wrong variable mysqli_num_rows($result) > 0.
$mysql_qry2 = "SELECT * FROM $username";
$result2 = mysqli_query($conn, $mysql_qry2);
$ans = "";
if ($result2->num_rows > 0) {
// output data of each row
while($row = $result2->fetch_assoc()) {
$ans = $ans . $row["driver"];
echo "$ans";
echo "a";
}
} else {
echo "b";
}