myqsli -> fetch TO pdo [closed] - php

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i need to change this mysqli to to working PDO:
$user = "name";
$pass = "password";
try {
$dbh = new PDO('mysql:host=host;dbname=dbname', $user, $pass);
$dbh = null;
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
$sth = $dbh->prepare("SELECT * FROM table");
$sth->execute();
while ($user = $sth->fetch(PDO::FETCH_ASSOC)) {
echo $user[1];
}
Using this fetch i dont get the expected result..
but this doesnt work, anybody could check it?
greetings

Answer 1

Why are you setting $dbh to null?
$dbh = new PDO('mysql:host=host;dbname=dbname', $user, $pass);
$dbh = null; <--remove this line.

Answer 2

It should be either:
while ($user = $sth->fetch(PDO::FETCH_ASSOC)) {
echo $user['username']; // Put the actual column name here, I'm just guessing
}
or:
while ($user = $sth->fetch(PDO::FETCH_NUM)) {
echo $user[1];
}
PDO::FETCH_ASSOC is like mysqli_fetch_assoc, and PDO::FETCH_NUM is like mysqli_fetch_row.