In the provided PHP script, what are the potential pitfalls or errors that could occur when inserting data into a MySQL database?

One potential pitfall when inserting data into a MySQL database is not properly sanitizing user input, which can lead to SQL injection attacks. To prevent this, you should always use prepared statements with parameterized queries to securely insert data into the database. 

// Using prepared statements to insert data into a MySQL database securely

// Assume $conn is a valid MySQL database connection

// User input
$username = $_POST['username'];
$email = $_POST['email'];

// Prepare the SQL statement
$stmt = $conn->prepare("INSERT INTO users (username, email) VALUES (?, ?)");
$stmt->bind_param("ss", $username, $email);

// Execute the statement
$stmt->execute();

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

Keywords

PHP MySQL database insertion SQL injection error handling

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