Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual

New Functions

PHP 5.3.x introduced some new functions:

PHP Core:

Date/Time:

GMP:

Hash:

IMAP:

JSON:

libXML:

MySQL Improved:

OpenSSL:

PCNTL:

PCRE:

Semaphore:

The following functions are now natively implemented, meaning they are always available no matter the operating system:


Migrating from PHP 5.2.x to PHP 5.3.x
PHP Manual