Securely Inserting Data into MySQL Database using PHP PDO

Once the table structure is ready, the next step is inserting data. We must be extremely careful regarding security, as SQL Injections are one of the most common vulnerabilities in web applications.

In the following example, we will use PDO (PHP Data Objects) and "Prepared Statements." This method ensures that the data being inserted is treated separately from the SQL command itself, preventing malicious attacks.

Key steps of the process:

• Establishing a secure connection to the database.
• Preparing the SQL statement using placeholders (?) as a template.
• Binding actual values to these placeholders.
• Executing the command and verifying success.

Here is a practical code example that inserts test data into the stranke table:

// Preparing the SQL statement (without direct data!)
$sql = "INSERT INTO stranke (first_name, last_name, address, house_number, city, zip_code) 
        VALUES (?, ?, ?, ?, ?, ?)";
$stmt = $pdo->prepare($sql);

// Execution with data insertion
$stmt->execute(['Andrej', 'Novak', 'Prešernova cesta', '12', 'Ljubljana', '1000']);

By using PDO, your programming becomes more professional, and your code remains readable and secure against external attacks.