# Upgrading from 3.1.2 to 3.1.3

Before performing an update you should take your site offline by replacing the index.php file with a static one.

## Step 1: Update your CodeIgniter files

Replace all files and directories in your system/ directory.

Note

If you have any custom developed files in these directories, please make copies of them first.

## Step 2: Remove usage of nice_date() helper (deprecation)

The Date Helper function `nice_date()` is no longer useful since the introduction of PHP’s DateTime classes

You can replace it with the following:

    DateTime::createFromFormat($input_format, $input_date)->format($desired_output_format);

Thus, `nice_date()` is now deprecated and scheduled for removal in CodeIgniter 3.2+.

Note

The function is still available, but you’re strongly encouraged to remove its usage sooner rather than later.

## Step 3: Remove usage of $config[‘standardize_newlines’]

The Input Library would optionally replace occurences of rn, r, n in input data with whatever the `PHP_EOL` value is on your system - if you’ve set `$config['standardize_newlines']` to `TRUE` in your application/config/config.php.

This functionality is now deprecated and scheduled for removal in CodeIgniter 3.2.+.

Note

The functionality is still available, but you’re strongly encouraged to remove its usage sooner rather than later.