What are common errors when trying to insert data into a database using PHP forms?

Common errors when trying to insert data into a database using PHP forms include not sanitizing user input, not connecting to the database properly, and not handling errors effectively. To solve these issues, always sanitize user input to prevent SQL injection attacks, ensure your database connection is established correctly, and use try-catch blocks to handle any potential errors that may arise during the insertion process. 

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Sanitize user input
$name = mysqli_real_escape_string($conn, $_POST['name']);
$email = mysqli_real_escape_string($conn, $_POST['email']);

// Insert data into database
$sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();

Keywords

SQL injection PDO prepared statements data validation error handling

Related Questions