What are the best practices for handling data manipulation operations like deletion in PHP applications to ensure data integrity and security?

When handling data manipulation operations like deletion in PHP applications, it is crucial to validate user input to prevent SQL injection attacks. Additionally, always use prepared statements with parameterized queries to sanitize input and avoid direct concatenation of user input in SQL queries. Finally, implement proper error handling to gracefully handle exceptions and ensure data integrity and security. 

// Example code snippet for handling deletion operation in PHP using prepared statements

// Assuming $conn is the database connection object

// Validate and sanitize user input
$id = filter_input(INPUT_POST, 'id', FILTER_VALIDATE_INT);

// Prepare and execute the deletion query using a prepared statement
$stmt = $conn->prepare("DELETE FROM table_name WHERE id = ?");
$stmt->bind_param("i", $id);
$stmt->execute();

// Check if the deletion was successful
if ($stmt->affected_rows > 0) {
    echo "Record deleted successfully.";
} else {
    echo "Error deleting record: " . $conn->error;
}

// Close the statement and connection
$stmt->close();
$conn->close();

Keywords

SQL injection PDO prepared statements data validation CSRF protection

Related Questions