What are the potential drawbacks of using question marks as placeholders in PDO queries in PHP?

Using question marks as placeholders in PDO queries can lead to confusion and errors when trying to bind parameters to the query. It can be difficult to keep track of which question mark corresponds to which parameter, especially in complex queries with multiple placeholders. To solve this issue, it is recommended to use named placeholders instead of question marks, as they provide a more intuitive way to bind parameters to the query. 

// Using named placeholders in PDO queries
$stmt = $pdo->prepare("SELECT * FROM table WHERE column1 = :param1 AND column2 = :param2");
$stmt->bindParam(':param1', $value1);
$stmt->bindParam(':param2', $value2);
$stmt->execute();

Keywords

PDO placeholders question marks security SQL injection

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