What are the common pitfalls to avoid when updating database records in PHP loops?

Common pitfalls to avoid when updating database records in PHP loops include not sanitizing user input properly, not using prepared statements to prevent SQL injection attacks, and not committing changes to the database within the loop to improve performance. To solve these issues, make sure to sanitize user input using functions like mysqli_real_escape_string, use prepared statements with placeholders for dynamic data, and commit changes to the database outside of the loop for better performance. 

// Example code snippet demonstrating how to update database records in a PHP loop safely

// Assuming $db is your database connection object

// Sanitize user input
$user_input = mysqli_real_escape_string($db, $user_input);

// Prepare a statement with a placeholder for dynamic data
$stmt = $db->prepare("UPDATE table_name SET column_name = ? WHERE id = ?");

// Bind parameters and execute the statement inside the loop
foreach ($records as $record) {
    $stmt->bind_param("si", $record['value'], $record['id']);
    $stmt->execute();
}

// Commit changes outside of the loop
$db->commit();

Keywords

SQL injection database transactions prepared statements PDO looping techniques

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