PDO和动态请求不起作用

Question

I have the following code :

$sth = $dbh->prepare('SELECT COUNT(*) as size FROM `users` WHERE uid  = :uidVal');
$sth->bindValue(':uidVal', $_POST['uid'], PDO::PARAM_INT); 
// $_POST['uid'] == 2147483647
$sth->execute();
$size = $sth->fetchAll();

print_r($size);

The print_r() return :

Array ( [0] => Array ( [size] => 0 [0] => 0 ) )

But this is my data base (mysql)

I don't understand why my COUNT(*) return 0, normally it should return 3?

EDIT (based on the comments)

This is my code after the select statement :

    $stmt = $dbh->prepare("INSERT INTO `users` (uid, uname) VALUES (?, ?)");
    $stmt->bindParam(1, $uid);
    $stmt->bindParam(2, $name);

    // insertion d'une ligne
    $name = $_POST['uname'];
    $uid = $_POST['uid'];
    $stmt->execute();

Why into my data base the uid value is 2147483647 while the uid value in my $_POST is 10152434954117198

Answer 1

The uid value is to big for my data base configuration :

10152434954117198 is a long not an integer

Answer 2

Try this code.

$sth = $dbh->prepare('SELECT COUNT(*) as size FROM `users` WHERE uid  = ?');
$sth->bindValue(1, $_POST['uid']); 
// $_POST['uid'] == 2147483647
$sth->execute();
$size = $sth->fetchAll();

print_r($size);

OR you can try this too

$sth = $dbh->prepare('SELECT COUNT(*) as size FROM `users` WHERE uid  = :uidVal'); 
// $_POST['uid'] == 2147483647
$sth->execute([
    "uidVal" => $_POST['uid']
]);
$size = $sth->fetchAll();

print_r($size);