PHP PDO: Displaying errors

Question

Do I need to use the try and catch block to display errors with PHP\'s PDO extension?

For example, with mysql you can usally do something like:

if ( ! $q         


        

Answer 1

PDO by default supports it's own Exception Class, PDOException.

There should be no reason why you cannot use:

try{
    $query = $db->prepare(...);
    if( !$query ){
        throw new Exception('Query Failed');
    }
}
catch(Exception $e){
    echo $e->getMessage();
}

The reason I only catch Exception is because PDOException is a child of Exception. Catching the Parent will catch ALL children.

Answer 2

If you don't want to use a try catch statement, you still can use this kind of code :

$query = $db->prepare("SELECT * FROM table");
if(!$query->execute()) {
   print_r($query->errorInfo());
}

Answer 3

public static function qry($sql) {
    try {
    $statement = $db_handle->prepare($sql);
    $retval = $statement->execute();
    if($statement->rowCount() >= 1) { 
        //do something               
    }else {
    $errors = $statement->errorInfo();
    echo $errors[2] . ", " . $errors[1] . " ," . $errors[0];
}
} catch (Exception $e) {
echo $e->getMessage();
}        
}

Answer 4

You can choose what PDO does with errors via PDO::ATTR_ERRMODE:

$pdo->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING); // Raise E_WARNING.
$pdo->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_SILENT); // Sets error codes.
// or
$pdo->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // throws exception