What are some best practices for copying and rewriting database entries in PHP to ensure data integrity?

When copying and rewriting database entries in PHP, it is important to ensure data integrity by properly sanitizing input, validating data, and using prepared statements to prevent SQL injection attacks. Additionally, make sure to handle errors and exceptions gracefully to avoid data corruption. 

// Example PHP code snippet for copying and rewriting database entries with data integrity

// Connect to the database
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

// Prepare a select statement to retrieve the original entry
$stmt = $pdo->prepare('SELECT * FROM mytable WHERE id = :id');
$stmt->bindParam(':id', $original_id);
$stmt->execute();
$original_entry = $stmt->fetch(PDO::FETCH_ASSOC);

// Prepare an insert statement to create a new entry with the same data
$stmt = $pdo->prepare('INSERT INTO mytable (column1, column2) VALUES (:column1, :column2)');
$stmt->bindParam(':column1', $original_entry['column1']);
$stmt->bindParam(':column2', $original_entry['column2']);
$stmt->execute();
$new_entry_id = $pdo->lastInsertId();

// Optionally, update any other related tables with the new entry ID
$stmt = $pdo->prepare('UPDATE related_table SET mytable_id = :new_entry_id WHERE mytable_id = :original_id');
$stmt->bindParam(':new_entry_id', $new_entry_id);
$stmt->bindParam(':original_id', $original_id);
$stmt->execute();

Keywords

SQL injection PDO prepared statements data validation transactions

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