How can one ensure data integrity when making changes to database access methods in PHP?

To ensure data integrity when making changes to database access methods in PHP, one should use transactions to group database operations together and ensure that either all of them succeed or none of them do. This helps prevent partial updates or inconsistencies in the database. Additionally, using prepared statements with parameterized queries can help prevent SQL injection attacks and ensure data is properly sanitized before being inserted into the database. 

// Start a transaction
$db->beginTransaction();

// Update database access method code here

// Commit the transaction if all operations were successful
$db->commit();

// Rollback the transaction if any operation fails
$db->rollBack();

Keywords

SQL injection prepared statements PDO data validation transaction handling

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