锟斤拷锟斤拷锟斤拷锟捷的憋拷锟�

锟斤拷锟杰大部凤拷锟斤拷锟叫碉拷 PHP 5 锟斤拷锟诫不锟斤拷要锟斤拷锟侥就匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷注锟斤拷一些锟斤拷锟斤拷锟斤拷锟捷的憋拷锟斤拷锟�

锟斤拷锟斤拷支锟斤拷 Windows XP 锟斤拷 2003

锟窖凤拷锟斤拷锟斤拷 Windows XP 锟斤拷 2003 锟斤拷支锟街★拷锟斤拷锟斤拷 Windows 锟芥本锟斤拷 PHP 锟斤拷要 Windows Vista 锟斤拷锟斤拷碌锟较低筹拷锟�

Case insensitivity no longer locale specific

All case insensitive matching for function, class and constant names is now performed in a locale independent manner according to ASCII rules. This improves support for languages using the Latin alphabet with unusual collating rules, such as Turkish and Azeri.

This may cause issues for code that uses case insensitive matches for non-ASCII characters in multibyte character sets (including UTF-8), such as accented characters in many European languages. If you have a non-English, non-ASCII code base, then you will need to test that you are not inadvertently relying on this behaviour before deploying PHP 5.5 to production systems.

pack() 锟斤拷 unpack() 锟斤拷锟斤拷锟侥变化

为使 pack() 锟斤拷 unpack() 锟斤拷锟斤拷锟斤拷 Perl 锟斤拷锟斤拷一些锟斤拷锟斤拷锟�

  • pack() 锟斤拷锟斤拷支锟斤拷"Z"锟斤拷式锟斤拷锟诫，锟斤拷锟斤拷值锟斤拷锟轿拷锟�"a"锟斤拷同锟斤拷
  • unpack() now support the "Z" format code for NULL padded strings, and behaves as "a" did in previous versions: it will strip trailing NULL bytes.锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷一锟斤拷锟芥本锟叫碉拷"a"锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 NULL 锟街节★拷
  • unpack() now keeps trailing NULL bytes when the "a" format code is used.
  • unpack() now strips all trailing ASCII whitespace when the "A" format code is used.

Writing backward compatible code that uses the "a" format code with unpack() requires the use of version_compare(), due to the backward compatibility break.

锟斤拷锟界：

<?php
// 锟斤拷前锟侥达拷锟诫：
$data = unpack('a5', $packed);

// 锟铰的达拷锟诫：
if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
  $data = unpack('Z5', $packed);
} else {
  $data = unpack('a5', $packed);
}
?>

锟狡筹拷 PHP logo GUIDs

The GUIDs that previously resulted in PHP outputting various logos have been removed. This includes the removal of the functions to return those GUIDs. The removed functions are:

Internal execution changes

Extension authors should note that the zend_execute() function can no longer be overridden, and that numerous changes have been made to the execute_data struct and related function and method handling opcodes.

Most extension authors are unlikely to be affected, but those writing extensions that hook deeply into the Zend Engine should read the notes on these changes.