What potential pitfalls should be considered when using multiple execute() calls in PDO?
When using multiple execute() calls in PDO, it's important to remember that each call will execute a new query on the database. This can lead to performance issues if not handled properly, as each query will incur overhead for preparing, executing, and fetching results. To avoid this, consider combining multiple queries into a single transaction or using prepared statements with placeholders to bind variables and execute the query only once.
// Example of using prepared statements with placeholders to execute multiple queries in a single call
// Initialize PDO connection
$pdo = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
// Start a transaction
$pdo->beginTransaction();
// Prepare the first query
$stmt1 = $pdo->prepare('INSERT INTO table1 (column1) VALUES (:value1)');
$value1 = 'example';
$stmt1->bindParam(':value1', $value1);
$stmt1->execute();
// Prepare the second query
$stmt2 = $pdo->prepare('INSERT INTO table2 (column2) VALUES (:value2)');
$value2 = 'example';
$stmt2->bindParam(':value2', $value2);
$stmt2->execute();
// Commit the transaction
$pdo->commit();