What are common mistakes to avoid when updating entries in a MySQL database using PHP?

Common mistakes to avoid when updating entries in a MySQL database using PHP include not sanitizing user input, not checking for errors after executing the query, and not using prepared statements to prevent SQL injection attacks. 

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

// Update entry in the database
$query = "UPDATE table_name SET column_name = '$newValue' WHERE id = $id";
$result = mysqli_query($conn, $query);

// Check for errors
if(!$result) {
    die('Error updating entry: ' . mysqli_error($conn));
}

Keywords

MySQL PHP database update errors

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