Mysql Stored Procedure Error (PDO version)

echo "<h1>Running test_procedure_1</h2>";
echo "<pre>";
echo "CREATE PROCEDURE `test_procedure_1`()".
"BEGIN".
"   select 'gary';".
"   CALL raise_error;".
"END";
echo "</pre>";
//connect to database
$connection = new \PDO("mysql:host=".$db['server'].";dbname=".$db['name'].";charset=utf8", $db['user'], $db['password']);


$stmt = $connection->prepare("CALL test_procedure_1");
if (!($stmt->execute())) {
    echo "CALL failed: (" . $stmt->errorCode() . ") " . print_r($stmt->errorInfo(),true);
}
else{
    //loop the result set
    echo "RESULTS:";
    while ($row = $stmt->fetch()) {
        print_r($row);
    }
}


echo "<br>----------<br>";
echo "<h1>Running test_procedure_2</h2>";
echo "<pre>";
echo "CREATE PROCEDURE `test_procedure_2`()".
"BEGIN".
"   CALL raise_error;".
"   select 'gary';".
"END";
echo "</pre>";
$connection = new \PDO("mysql:host=".$db['server'].";dbname=".$db['name'].";charset=utf8", $db['user'], $db['password']);

$stmt = $connection->prepare("CALL test_procedure_2");
if (!($stmt->execute())) {
    echo "CALL failed: (" . $stmt->errorCode() . ") " . print_r($stmt->errorInfo(),true);
}
else{
    //loop the result set
    echo "RESULTS:";
    while ($row = $stmt->fetch()) {
        print_r($row);
    }
}
echo "<br>----------<br>";