MySQL PHP PDO remote server - php

Question

I can not connect to a remote server with PDO:
public function dbConnection ($dbHost, $dbName, $dbUsername, $dbPass){
try{
$dbChain = 'mysql:host='.$dbHost.';dbname='.$dbName;
$dbh = new PDO($dbChain, $dbUsername, $dbPass);
print_r($dbh->errorInfo());
die;
...
errorInfo() only returns something if I have for instance the wrong user or password. With the right one it does not report anything, but $dbh remains empty.
errorInfo()
Array
(
[0] =>
[1] =>
[2] =>
)
$dbh
object(PDO)#5 (0) {
}
It's a remote server, but I have access using for instance MySQl Workbench, from the same machine. For the local MySQL server DB the same code works just fine.
What could be wrong with the remote connection?
Edit:
public function dbConnection ($dbHost, $dbName, $dbUsername, $dbPass){
try{
$dbChain = 'mysql:host='.$dbHost.';dbname='.$dbName;
$dbh = new PDO($dbChain, $dbUsername, $dbPass);
$dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e){
echo $e->getMessage();
$errorCode = $e->getCode();
var_dump($errorCode);
}
I tried this and I get the same empty result.
object(PDO)#5 (0) {
}
Edit2: Same result.
$dbh = new PDO($dbChain, $dbUsername, $dbPass
, [PDO::ATTR_EMULATE_PREPARES => false,
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);

Answer 1

You should use a catch, after setting the proper error attributes, to see if there are errors -
try {
$dbChain = 'mysql:host='.$dbHost.';dbname='.$dbName;
$dbh = new PDO($dbChain, $dbUsername, $dbPass);
$dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e) {
echo $e->getMessage();
$errorCode = $e->getCode();
}