Other changes

• SplFileInfo::getpathinfo() now returns
  information about the path name.
• SplObjectStorage now has ArrayAccess support.
  It is now also possible to store associative information with
  objects in SplObjectStorage.
• In the GD extension,
  there is now pixelation support available through the imagefilter() function.
• var_dump() output now includes private object
  properties.
• session_start() now returns
  FALSE when session startup
  fails.
• property_exists() now checks the existence of
  a property independent of accessibility (like method_exists()).
• Stream wrappers can now be used by include_path.
• The initial parameter for array_reduce() can now be of any
  type.
• The directory functions opendir(), scandir(), and
  dir() now use the default stream context if
  no explicit context is passed.
• crypt() now has Blowfish and extended DES
  support, and crypt() features are now 100% portable.
  PHP has its own internal crypt implementation which drops into
  place when support for crypt or crypt_r is not
  found.
• getopt() now accepts “long options” on all
  platforms. Optional values and = as a separator for short
  options are now supported.
• fopen() has a new mode option (n),
  which passes O_NONBLOCK to the
  underlying open() system call. Note that this mode is not
  currently supported on Windows.
• getimagesize() now supports icon files
  (.ico).
• The mhash extension have
  moved to PECL, but the Hash extension have been modified to support mhash if
  PHP is compiled with –with-mhash. Note that the Hash
  extension does not require the mhash library to be available
  whether or not the mhash emulation is enabled.