How can you optimize the code for updating database values in PHP to ensure efficiency and security?

When updating database values in PHP, it's important to optimize the code for efficiency and security. One way to do this is by using prepared statements to prevent SQL injection attacks and improve performance by reusing the query execution plan. Additionally, you can minimize the number of database queries by updating multiple values in a single query whenever possible. 

// 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);
}

// Prepare and execute the update query using a prepared statement
$stmt = $conn->prepare("UPDATE table_name SET column1 = ?, column2 = ? WHERE id = ?");
$stmt->bind_param("ssi", $value1, $value2, $id);

$value1 = "new value 1";
$value2 = "new value 2";
$id = 1;

$stmt->execute();

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

Keywords

SQL injection prepared statements PDO mysqli database optimization

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