What are some common pitfalls to avoid when working with MySQL and PHP integration?

One common pitfall to avoid when working with MySQL and PHP integration is failing to properly sanitize user input, which can lead to SQL injection attacks. To prevent this, always use prepared statements with parameterized queries to securely interact with the database. 

// Example of using prepared statements with parameterized queries to avoid SQL injection
$mysqli = new mysqli("localhost", "username", "password", "database");

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

// Prepare a SQL query with placeholders
$stmt = $mysqli->prepare("SELECT * FROM users WHERE username = ?");

// Bind parameters to the placeholders
$stmt->bind_param("s", $username);

// Set the parameter values
$username = $_POST['username'];

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

// Get the result set
$result = $stmt->get_result();

// Fetch the data
while ($row = $result->fetch_assoc()) {
    // Process the data
}

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

Keywords

MySQL PHP integration SQL injection PDO error handling

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