Changes in PHP datetime support
New Functions
Migrating from PHP 5.1.x to PHP 5.2.x
PHP Manual

## New Parameters

Some functions were given new, optional, parameters in PHP 5.2.x:

PHP Core:

- htmlentities() - added `double_encode` in PHP 5.2.3.
- htmlspecialchars() - added `double_encode` in PHP 5.2.3.
- base64_decode() - added `strict`
- setcookie() - added `httponly`
- setrawcookie() - added `httponly`
- session_set_cookie_params() - added `httponly`
- memory_get_usage() - added `real_usage`
- get_loaded_extensions() - added `zend_extensions` in PHP 5.2.4

curl:

- curl_multi_info_read() - added `msgs_in_queue`

datetime

- date() - added "u" (milliseconds) format character in PHP 5.2.2

imap:

- imap_open() - added `n_retries`
- imap_reopen() - added `n_retries`

mbstring:

- mb_strrpos() - added `offset`
  Warning

  The `offset` parameter was put in the position the `encoding` parameter used to be. Backward compatibility has been provided by allowing `encoding` to be specified as the third parameter. Using this backward compatibility mode is not recommended because it will be removed in a future release of PHP.

ming:

- swfmovie::streamMP3() - added `skip` in PHP 5.2.1

openssl:

- openssl_verify() - added `signature_algo`

pgsql:

- pg_escape_bytea() - added `connection`
- pg_escape_string() - added `connection`

simplexml:

- SimpleXMLElement::__construct() - added `is_prefix`
- SimpleXMLElement::attributes() - added `is_prefix`
- SimpleXMLElement::children() - added `is_prefix`
- simplexml_load_file() - added `is_prefix`
- simplexml_load_string() - added `is_prefix`

spl:

- array iterator_to_array(Traversable it [, bool use_keys = true]) - added `use_keys` in PHP 5.2.1

xmlreader:

- XMLReader::open() - added `encoding` and `options`
- XMLReader::XML() - added `encoding` and `options`

XMLWriter:

- XMLWriter::WriteElement() - the `content` became optional in PHP 5.2.3
- XMLWriter::WriteElementNs() - the `content` became optional in PHP 5.2.3

Changes in PHP datetime support
New Functions
Migrating from PHP 5.1.x to PHP 5.2.x
PHP Manual