What best practices should be followed when updating MySQL database values using PHP?

When updating MySQL database values using PHP, it is important to properly sanitize user input to prevent SQL injection attacks. Additionally, it is recommended to use prepared statements to securely update database values. Finally, always remember to handle errors gracefully and provide appropriate feedback to the user. 

<?php
// Assume $conn is the MySQL database connection object

// Sanitize user input
$newValue = mysqli_real_escape_string($conn, $_POST['new_value']);

// Prepare and execute update query using prepared statements
$stmt = $conn->prepare("UPDATE table_name SET column_name = ? WHERE id = ?");
$stmt->bind_param("si", $newValue, $id);
$id = 1; // Example ID
$stmt->execute();

// Check for errors and provide feedback
if ($stmt->affected_rows > 0) {
    echo "Value updated successfully.";
} else {
    echo "Error updating value.";
}

$stmt->close();
$conn->close();
?>

Keywords

MySQL PHP database update values

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