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036314329a
php-src/UPGRADING
Kalle Sommer Nielsen 036314329a * use is a reserved keyword 
* notes to Windows section
2009-05-07 03:14:07 +00:00

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$Id$
UPGRADE NOTES - PHP 5.3
1. Reserved words and classes
2. Changes made to existing functions
3. Changes made to existing methods
4. Changes made to existing classes
5. Deprecated
6. Undeprecated
7. Extensions:
a. moved out to PECL and actively maintained there
b. no longer maintained
c. with changed behaviour
d. no longer possible to disable
8. Changes in SAPI support
9. Changes in INI directives
10. Syntax additions
11. Windows support
12. New in PHP 5.3:
a. New libraries
b. New extensions
c. New stream wrappers
d. New functions
e. New global constants
f. New classes
g. New methods
h. New class constants
=============================
1. Reserved words and classes
=============================
- **namespace**, **use** and **goto** are now reserved keywords.
- **Closure** is now a reserved class. (Used by lambda and closure.)
=====================================
2. Changes made to existing functions
=====================================
- The array functions natsort(), natcasesort(), usort(), uasort(), uksort(),
array_flip() and array_unique(), no longer accept objects passed as arguments.
If you need to access their properties using an object, you will need to cast
the objects to arrays first.
- var_dump() output now includes private object members.
- session_start() now returns FALSE when the session startup fails.
- clearstatcache() no longer clears the realpath cache by default.
- The filesystem functions opendir(), scandir() and dir() now use the default
context if no context is passed as an argument to them.
- The behaviour of functions with by-reference parameters called by value has
changed. Where previously the function would accept the by-value argument, a
warning is now emitted and all by-ref parameters are set to NULL.
- There is now native support for the following math functions: asinh(), acosh(),
atanh(), log1p() and expm1().
- In the GD extension, there is now pixelation support available through
the imagefilter() function.
- 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.
- get_cfg_var() is now able to return "array" INI options.
- Stream wrappers can now be used by include_path().
- There are new parameters in:
clearstatcache(): clear_realpath_cache and filename.
copy(): context.
fgetcsv(): escape.
ini_get_all(): details.
nl2br(): is_xhtml.
parse_ini_file(): scanner_mode.
round(): mode.
stream_context_create(): params.
strstr(), stristr(): before_needle.
===================================
3. Changes made to existing methods
===================================
- The magic methods __get(), __set(), __isset(), __unset() and __call() should
always be public and can no longer be static. Method signatures are enforced.
- The __toString() magic method can no longer accept arguments.
- There is a new magic method, __callStatic().
- count() vs count_elements() handler resolution rules have changed. (This could
potentially break custom PHP extensions.)
- The trailing / has been removed from SplFileInfo and other related directory
classes.
- SplFileInfo::getpathinfo() now returns information about the path name.
- There are new parameters in:
Exception::__construct(): previous.
===================================
4. Changes made to existing classes
===================================
- SplObjectStorage now has ArrayAccess support. It is also now possible to
store associative information with objects in SplObjectStorage.
=============
5. Deprecated
=============
- define_syslog_variables() is deprecated.
- All ereg functions are deprecated. Use PCRE (preg_*()) instead.
===============
6. Undeprecated
===============
- By popular request, is_a() is no longer marked deprecated.
==============
7. Extensions:
==============
a. moved out to PECL and actively maintained there
- fpdf
- ming
- ncurses
b. no longer maintained
- dbase
- fbsql
- msql
- sybase (use sybase_ct, which is still in PHP core)
c. with changed behaviour
- hash: The SHA-224 hash algorithm is now supported.
- oci8a: Calling oci_close() on a persistent connection, or on a variable
that references a persistent connection going out of scope, will now
roll back any uncommitted transaction. You should explicitly commit or
rollback as needed.
Setting oci8.old_oci_close semantics=On in php.ini gives the old
behaviour.
- openssl: There is now support for OpenSSL digest and cipher functions.
It is also now possible to access the internal values of DSA, RSA and
DH keys.
- session: Sessions will no longer store session-files in "/tmp" where
open_basedir restrictions apply, unless "/tmp" is explicitly added to
the list of allowed paths.
d. no longer possible to disable
- PCRE
- Reflection
- SPL
==========================
8. Changes in SAPI support
==========================
- FastCGI is now always enabled and can not be disabled. See sapi/cgi/CHANGES
for more details.
- A new CGI SAPI option, -T, can be used to measure execution time of a script
repeated several times.
- CGI/FastCGI now has support for .htaccess style user-defined php.ini files.
============================
9. Changes in INI directives
============================
- zend.ze1_compatibility_mode has been removed.
- A new user initialization mechanism and config variables have been added:
user_ini.filename and user_ini.cache_ttl
- There is now support for special sections: [PATH=/opt/httpd/www.example.com/]
and [HOST=www.example.com]. Directives set in these sections cannot be
overridden by user-defined INI files or at runtime.
- Added mbstring.http_output_conv_mimetype. This directive specifies the
regex pattern of content types for which mb_output_handler() is activated.
- It is now possible to use the full path to load modules using the "extension"
directive.
- "ini-variables" can now be used almost anywhere in a php.ini file.
- It is now possible to use alphanumeric or variable indices in ini option
arrays.
- Runtime tightening of open_basedir restrictions is now possible.
====================
10. Syntax additions
====================
- NOWDOC is like HEREDOC but with single quotes:
<<<'LABEL' ...
Static HEREDOCs can be used to initialize static variables and class members
or constants:
static $foo = <<<LABEL
No variables here...
LABEL;
- The ?: operator has been introduced:
var_dump(0 ?: 'Hello!');
===================
11. Windows support
===================
- The minimum Windows version is now Windows 2000. (Windows 98 and NT4 are no
longer supported).
- PHP Windows binaries target i586 or later. i386 and i486 are not supported.
- Windows support has been added for the following functions: getopt(),
imagecolorclosesthwb(), mcrypt_create_iv(), inet_ntop(), inet_pton(),
getmxrr(), checkdnsrr(), dns_get_record(), linkinfo(), readlink(),
symlink(), link(), fnmatch(), stream_socket_pair(), time_nanosleep(),
time_sleep_until() and socket_create_pair().
- Its now possible to use hardlinks on Windows using the link() function,
and symbolic links via the symlink() function. Hardlinks are available
as of Windows 2000 and symbolic links as of Windows Vista.
===================
12. New in PHP 5.3:
===================
a. New libraries
- mysqlnd is a new core library shipped with PHP. It is a PHP-specific
replacement for libmysql.
b. New extensions
- fileinfo
- intl
- Phar
- SQLite3
c. New stream wrappers
- glob:// stream wrapper
- phar:// stream wrapper for accessing phar archives
d. New functions
- Core: gc_collect_cycles()
gc_enabled()
gc_enable()
gc_disable()
class_alias()
get_called_class()
get_extension_funcs()
forward_static_call()
forward_static_call_array()
str_getcsv()
quoted_printable_encode()
lcfirst()
- Array: array_replace()
array_replace_recursive()
- Date: date_add()
date_sub()
date_diff()
date_parse_from_format()
date_create_from_format()
date_get_last_errors()
- INI: parse_ini_string()
- GMP: gmp_testbit()
- Hash: hash_copy()
- JSON: json_last_error()
- MySQLi: mysqli_fetch_all()
mysqli_get_connection_stats()
mysqli_poll()
mysqli_reap_async_query()
- Network: gethostname()
- OpenSSL: openssl_random_pseudo_bytes()
- PCNTL: pcntl_signal_dispatch()
pcntl_sigprocmask()
pcntl_sigwaitinfo()
pcntl_sigtimedwait()
- PCRE: preg_filter()
- SHM: msg_queue_exists()
- Streams: stream_supports_lock()
stream_context_set_default()
e. New global constants
- Core: E_DEPRECATED
E_USER_DEPRECATED
__DIR__
__NAMESPACE__
- INI: INI_SCANNER_NORMAL
INI_SCANNER_RAW
- GD: IMG_FILTER_PIXELATE
- JSON: JSON_ERROR_NONE
JSON_ERROR_DEPTH
JSON_ERROR_STATE_MISMATCH
JSON_ERROR_CTRL_CHAR
JSON_ERROR_SYNTAX
- LDAP: LDAP_OPT_NETWORK_TIMEOUT
- PCRE: PREG_BAD_UTF8_OFFSET_ERROR
- PCNTL: SIG_BLOCK
SIG_UNBLOCK
SIG_SETMASK
SI_USER
SI_NOINFO
SI_KERNEL
SI_QUEUE
SI_TIMER
SI_MESGQ
SI_ASYNCIO
SI_SIGIO
SI_TKILL
CLD_EXITED
CLD_KILLED
CLD_DUMPED
CLD_TRAPPED
CLD_STOPPED
CLD_CONTINUED
TRAP_BRKPT
TRAP_TRACE
POLL_IN
POLL_OUT
POLL_MSG
POLL_ERR
POLL_PRI
POLL_HUP
ILL_ILLOPC
ILL_ILLOPN
ILL_ILLADR
ILL_ILLTRP
ILL_PRVOPC
ILL_PRVREG
ILL_COPROC
ILL_BADSTK
FPE_INTDIV
FPE_INTOVF
FPE_FLTDIV
FPE_FLTOVF
FPE_FLTUND
FPE_FLTRES
FPE_FLTINV
FPE_FLTSUB
SEGV_MAPERR
SEGV_ACCERR
BUS_ADRALN
BUS_ADRERR
BUS_OBJERR
f. New classes
- Date: DateInterval
DatePeriod
- Phar: Phar
PharData
PharFileInfo
PharException
- SPL SplDoublyLinkedList
SplStack
SplQueue
SplHeap
SplMinHeap
SplMaxHeap
SplPriorityQueue
SplFixedArray
FilesystemIterator
GlobIterator
RecursiveTreeIterator
MultipleIterator
g. New methods
- Date: DateTime::diff()
DateTime::add()
DateTime::sub()
DateTime::createFromFormat()
DateTime::getLastErrors()
- PDO_Firebird: PDO::setAttribute()
- Reflection: ReflectionProperty::setAccessible()
ReflectionFunction::getClosureThis()
ReflectionFunction::inNamespace()
ReflectionFunction::getNamespaceName()
ReflectionFunction::getShortName()
ReflectionClass::inNamespace()
ReflectionClass::getNamespaceName()
ReflectionClass::getShortName()
- XSL: XSLTProcessor::setProfiling()
h. New class constants
- PDO_Firebird: PDO::FB_ATTR_DATE_FORMAT
PDO::FB_ATTR_TIME_FORMAT
PDO::FB_ATTR_TIMESTAMP_FORMAT
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