What are some common mistakes when trying to save JavaScript screen resolution data to a MySQL table using PHP?

One common mistake when trying to save JavaScript screen resolution data to a MySQL table using PHP is not properly sanitizing the input data before inserting it into the database. This can lead to SQL injection attacks. To solve this issue, make sure to use prepared statements and bind parameters to securely insert the data into the database. 

// Assuming you have already collected the screen resolution data in JavaScript and sent it to a PHP script

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

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

// Prepare SQL statement
$stmt = $mysqli->prepare("INSERT INTO screen_resolutions (width, height) VALUES (?, ?)");

// Bind parameters
$stmt->bind_param("ii", $width, $height);

// Set parameters and execute
$width = $_POST['width']; // Assuming 'width' is the key sent from JavaScript
$height = $_POST['height']; // Assuming 'height' is the key sent from JavaScript
$stmt->execute();

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

Keywords

JavaScript screen resolution MySQL PHP data saving

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