Fejlhåndtering ved standard mysql contra PDO

<?php
$db_host = "xxx";
$db_name = "xxx";
$db_user = "xxx";
$db_pass = "xxx";

try {  
    // database connection  
    $conn = new PDO("mysql:host=".$db_host.";dbname=".$db_name.";charset=utf8", $db_user, $db_pass, array(PDO::ATTR_PERSISTENT => true)); 
}  


catch(PDOException $pdo_error) {
    echo "Fejl i databaseforbindelsen";
    exit;
}

$conn->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
$conn->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$sql = ("
    SELECT *
    FROM `admins`
    WHERE `user` = :user
");

$sql_param = array(
    'user' => "fornavn\efternavn"
);

try {  
    $stsm = $conn->prepare($sql);
}  

catch(PDOException $pdo_error) {
    echo "Fejl i prepare.";
    exit;
}

try {  
    $stsm->execute($sql_param); 
}  

catch(PDOException $pdo_error) {
    echo "Fejl i execute";
    exit;
}

if ($stsm->errorCode() == 0) {
    if ($stsm->rowCount() > 0) { 
        while ($row_user = $stsm->fetch()) {
            echo $row_user['USER']."<br>";
        }
    } else {
        echo "Ingen rækker";
    }
} else {
    $errors = $stsm->errorInfo();
    echo($errors[2]);
} 
?>