What are the potential pitfalls of using MySQL queries in PHP?

One potential pitfall of using MySQL queries in PHP is the risk of SQL injection attacks if user input is not properly sanitized. To prevent this, you should always use prepared statements with parameterized queries to securely interact with the database. 

// Example of using prepared statements to prevent SQL injection

// Establish a database connection
$mysqli = new mysqli("localhost", "username", "password", "database");

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

// Bind the parameter and execute the statement
$username = $_POST['username'];
$stmt->bind_param("s", $username);
$stmt->execute();

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

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

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

Keywords

MySQL queries PHP SQL injection error handling database security

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