New Classes
Changes to INI file handling
Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual

## New Global Constants

PHP Core:

- `__DIR__`
- `__NAMESPACE__`
- `E_DEPRECATED`
- `E_USER_DEPRECATED`
- `INI_SCANNER_NORMAL`
- `INI_SCANNER_RAW`
- `PHP_MAXPATHLEN`
- `PHP_WINDOWS_NT_DOMAIN_CONTROLLER`
- `PHP_WINDOWS_NT_SERVER`
- `PHP_WINDOWS_NT_WORKSTATION`
- `PHP_WINDOWS_VERSION_BUILD`
- `PHP_WINDOWS_VERSION_MAJOR`
- `PHP_WINDOWS_VERSION_MINOR`
- `PHP_WINDOWS_VERSION_PLATFORM`
- `PHP_WINDOWS_VERSION_PRODUCTTYPE`
- `PHP_WINDOWS_VERSION_SP_MAJOR`
- `PHP_WINDOWS_VERSION_SP_MINOR`
- `PHP_WINDOWS_VERSION_SUITEMASK`

cURL:

- `CURLOPT_PROGRESSFUNCTION`

GD:

- `IMG_FILTER_PIXELATE`

JSON:

- `JSON_ERROR_CTRL_CHAR`
- `JSON_ERROR_DEPTH`
- `JSON_ERROR_NONE`
- `JSON_ERROR_STATE_MISMATCH`
- `JSON_ERROR_SYNTAX`
- `JSON_FORCE_OBJECT`
- `JSON_HEX_TAG`
- `JSON_HEX_AMP`
- `JSON_HEX_APOS`
- `JSON_HEX_QUOT`

LDAP:

- `LDAP_OPT_NETWORK_TIMEOUT`

libxml:

- `LIBXML_LOADED_VERSION`

PCRE:

- `PREG_BAD_UTF8_OFFSET_ERROR`

PCNTL:

- `BUS_ADRALN`
- `BUS_ADRERR`
- `BUS_OBJERR`
- `CLD_CONTIUNED`
- `CLD_DUMPED`
- `CLD_EXITED`
- `CLD_KILLED`
- `CLD_STOPPED`
- `CLD_TRAPPED`
- `FPE_FLTDIV`
- `FPE_FLTINV`
- `FPE_FLTOVF`
- `FPE_FLTRES`
- `FPE_FLTSUB`
- `FPE_FLTUND`
- `FPE_INTDIV`
- `FPE_INTOVF`
- `ILL_BADSTK`
- `ILL_COPROC`
- `ILL_ILLADR`
- `ILL_ILLOPC`
- `ILL_ILLOPN`
- `ILL_ILLTRP`
- `ILL_PRVOPC`
- `ILL_PRVREG`
- `POLL_ERR`
- `POLL_HUP`
- `POLL_IN`
- `POLL_MSG`
- `POLL_OUT`
- `POLL_PRI`
- `SEGV_ACCERR`
- `SEGV_MAPERR`
- `SI_ASYNCIO`
- `SI_KERNEL`
- `SI_MESGQ`
- `SI_NOINFO`
- `SI_QUEUE`
- `SI_SIGIO`
- `SI_TIMER`
- `SI_TKILL`
- `SI_USER`
- `SIG_BLOCK`
- `SIG_SETMASK`
- `SIG_UNBLOCK`
- `TRAP_BRKPT`
- `TRAP_TRACE`

New Classes
Changes to INI file handling
Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual