count rows and echo the result - php

Question

I am trying to do a row count, I want to count a row (nummer) and if there is more then 1 row with the same number then echo. but no matter how many rows I have in my tabel, it only returs 0
$nummer = $_GET['nummer'];
$pdo = Database::connect();
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$result = $pdo->prepare("select count(*) from rum where nummer=:n");
$result->bindParam(':n', $nummer, PDO::PARAM_INT);
$result->execute();
$rows = $result->fetchAll;
if(count($rows) >1) {
echo "1";}
else {
echo "0";
}

Answer 1

The following statement
$result = $pdo->prepare("select count(*) from rum where nummer=:n");
will always return one row with the count number, so doing
$rows = $result->fetchAll;
will always return one.
You may do as
$result = $pdo->prepare("select count(*) as tot from rum where nummer=:n");
....
....
$rows = $result->fetchAll();
if($rows["tot"] > 0 ){
echo 'something'
}else{
echo 'something else'
}

Answer 2

just use fetch() instead of fetchAll()
$rows = $result->fetch();
if($rows[0]) >1) {
echo "1";
} else {
echo "0";
}

Answer 3

It looks like you're having two mistakes.
First one: If you're querying for COUNT(*) - you are getting a number of rows. For example: You're return will be a field named COUNT(*) with one row containing the number of rows found.
If you replace
$result = $pdo->prepare("select count(*) from rum where nummer=:n");
with
$result = $pdo->prepare("select * from rum where nummer=:n");
Second one:
Replace
$rows = $result->fetchAll;
With
$rows = $result->fetchAll();
fetchAll() is no property but a method.
The other way would be your query but naming the field (MySQL AS keyword) and calling $rows = $result->fetch(); afterwards and checking $rows->fieldName for the number of found rows.

Answer 4

Use PDOStatement::fetchColumn(). It is useful for "one-column" resultsets (which relatively often produced by queries like SELECT COUNT(...) FROM ...). Example:
$nummer = isset($_GET['nummer']) ? $_GET['nummer'] : null;
$pdo = Database::connect();
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $pdo->prepare('SELECT COUNT(*) FROM rum WHERE (nummer = :n)');
$stmt->bindParam(':n', $nummer, PDO::PARAM_INT);
$stmt->execute();
$rows = $stmt->fetchColumn();
echo $rows > 1 ? "1" : "0";