update MySQL in PHP

<?php
// Connect to the database
$servername = "localhost";
$username = "yourusername";
$password = "yourpassword";
$dbname = "yourdatabasename";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

// Update data in the database
$sql = "UPDATE yourtable SET yourcolumn='newvalue' WHERE id=1";

if (mysqli_query($conn, $sql)) {
    echo "Record updated successfully";
} else {
    echo "Error updating record: " . mysqli_error($conn);
}

// Close the database connection
mysqli_close($conn);
?>