php-pdo显示错误准备执行

Question

如何使用以下特定的准备和执行来显示PDO的错误：

try 
{
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $stmt = $pdo->prepare("SELECT ZZZZZZ, nomepostazimiele FROM postazimiele");
    $stmt->execute();
    while ($row_postazimiele = $stmt->fetch(PDO::FETCH_ASSOC)) 
    {
        $idnomepostazi = $row_postazimiele['idpostazi'];
        $nomepostazimiele = $row_postazimiele['nomepostazimiele'];
        echo "<option value="$nomepostazimiele">$nomepostazimiele</option>";
    }
} 
catch (pdoException $e) 
{
    echo 'Attenzione: ' . $e->getMessage();
    $output = "Impossibile collegarsi al Data Base, Utente o Password errati"
            . "<br>" . "<br>" . "prego riprovare" . $e 
            . "<br>" . "<br>" . "<a href='miele.php'>Clicca QUI per ritornare alla pagina principale</a>";
    include 'errore.html.php';
    exit();
}

如果我在类似SELECT的up中出错，则不会出现任何错误。为什么？

有人能帮我吗？

Answer 1

您需要获得execute的输出，您希望显示错误而不是异常。

if($stmt->execute()){
    echo "Error: ".$stmt->errorInfo();
}