Undeprecated features in PHP 5.3.x
New Functions
Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual

## New Parameters

Several functions were given new, optional parameters in PHP 5.3:

PHP Core:

- clearstatcache() - Added `clear_realpath_cache` and `filename`.
- copy() - Added a stream context parameter, `context`.
- fgetcsv() - Added `escape`.
- ini_get_all() - Added `details`.
- nl2br() - Added `is_xhtml`.
- parse_ini_file() - Added `scanner_mode`.
- round() - Added `mode`.
- stream_context_create() - Added `params`.
- strstr() and stristr() - Added `before_needle`.

json:

- json_encode() - Added `options`.
- json_decode() - Added `depth`.

Streams:

- stream_select(), stream_set_blocking(), stream_set_timeout(), and stream_set_write_buffer() now work with user-space stream wrappers.

sybase_ct:

- sybase_connect() - Added `new`.

New method parameters in PHP 5.3.0:

PHP Core:

- Exception::__construct - Added `previous`.

Undeprecated features in PHP 5.3.x
New Functions
Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual