php语言7.2.0 alpha1最新版

php语言7.2.0 alpha1最新版是php脚本语言的最新版本，新版本加入了更多新的特性，修复以前版本中遗留的BUG，php是一款非常实用的脚本语言，被广泛应用于web领域，需要的用户赶快来下载吧。

Windows 安装方法

你可以从 windows.php.net/download 下载二进制包。 解压后, 最好为你的 PHP 所在的根目录（php.exe 所在的文件夹）设置PATH，这样就可以从命令行中直接执行 PHP。

Windows 下有多种安装 PHP 的方式，你可以 下载二进制安装包 并使用.msi安装程序。从 PHP 5.3.0 之后，这个安装程序将不再提供下载支持。

如果只是学习或者本地开发，可以直接使用 PHP 5.4+ 内置的 Web 服务器， 还能省去配置服务器的麻烦。如果你想要包含有网页服务器以及 MySql 的集成包，那么像是Web Platform Installer, XAMPP, EasyPHP 和 WAMP 这类工具将会帮助你快速建立 Windows 开发环境。不过这些工具将会与线上环境有些许差别，如果你是在 Windows 下开发，而生产环境则部署至 Linux ，请小心。

如果你需要将生产环境部署在 Windows 上，那 IIS7 将会提供最稳定和最佳的性能。你可以使用 phpmanager (IIS7 的图形化插件) 让你简单的设置并管理 PHP。IIS7 也有内置的 FastCGI ，你只需要将 PHP 配置为它的处理器即可。更多详情请见dedicated area on iis.net。

语言亮点

编程范式

PHP 是一个灵活的动态语言，支持多种编程技巧。这几年一直不断的发展，重要的里程碑包含 PHP 5.0 (2004) 增加了完善的面向对象模型，PHP 5.3 (2009) 增加了匿名函数与命名空间以及 PHP 5.4 (2012) 增加的 traits。

面向对象编程

PHP 拥有完整的面向对象编程的特性，包括类，抽象类，接口，继承，构造函数，克隆和异常等。

阅读 PHP 面向对象编程

阅读 Traits

函数式编程 Functional Programming

PHP 支持函数是”第一等公民”，即函数可以被赋值给一个变量，包括用户自定义的或者是内置函数，然后动态调用它。函数可以作为参数传递给其他函数（称为高阶函数），也可以作为函数返回值返回。

PHP 支持递归，也就是函数自己调用自己，但多数 PHP 代码使用迭代。

自从 PHP 5.3 (2009) 之后开始引入对闭包以及匿名函数的支持。

PHP 5.4 增加了将闭包绑定到对象作用域中的特性，并改善其可调用性，如此即可在大部分情况下使用匿名函数取代一般的函数。

更新特性

- Core:

. Added ZEND_COUNT, ZEND_GET_CLASS, ZEND_GET_CALLED_CLASS, ZEND_GET_TYPE,ZEND_FUNC_NUM_ARGS, ZEND_FUNC_GET_ARGS instructions, to implementcorresponding builtin functions. (Dmitry)

. "Countable" interface is moved from SPL to Core. (Dmitry)

. Added ZEND_IN_ARRAY instruction, implementing optimized in_array() builtin

  function, through hash lookup in flipped array. (Dmitry)

. Removed IS_TYPE_IMMUTABLE (it's the same as COPYABLE & !REFCOUNTED). (Dmitry)

. Removed the sql.safe_mode directive. (Kalle)

. Removed support for Netware. (Kalle)

. Renamed ReflectionClass::isIterateable() to ReflectionClass::isIterable()

  (alias original name for BC). (Sara)

. Fixed bug #54535 (WSA cleanup executes before MSHUTDOWN). (Kalle)

. Implemented FR #69791 (Disallow mail header injections by extra headers)

  (Yasuo)

. Implemented FR #49806 (proc_nice() for Windows). (Kalle)

. Fix pthreads detection when cross-compiling (ffontaine)

. Fixed memory leaks caused by exceptions thrown from destructors. (Bob,

  Dmitry).

. Fixed bug #73215 (uniqid() should use better random source). (Yasuo)

. Fixed bug #73337 (try/catch not working with two exceptions inside a same

  operation). (Dmitry)

. Implemented FR #72768 (Add ENABLE_VIRTUAL_TERMINAL_PROCESSING flag for

  php.exe). (Michele Locati)

. Implemented "Convert numeric keys in object/array casts" RFC, fixes

  bugs #53838, #61655, #66173, #70925, #72254, etc. (Andrea)

. Implemented "Deprecate and Remove Bareword (Unquoted) Strings" RFC.

  (Rowan Collins)

. Raised minimum supported Windows versions to Windows 7/Server 2008 R2.

  (Anatol)

. Implemented minor optimization in array_keys/array_values(). (Sara)

. Fixed bug #73969 (segfault in debug_print_backtrace). (andrewnester)

. Added PHP_OS_FAMILY constant to determine on which OS we are. (Jan Altensen)

. Fixed bug #73994 (arginfo incorrect for unpack). (krakjoe)

. Fixed bug #73973 (assertion error in debug_zval_dump). (andrewnester)

. Fixed bug #73987 (Method compatibility check looks to original 

  definition and not parent). (pmmaga)

. Fixed bug #73991 (JSON_OBJECT_AS_ARRAY not respected). (Sara)

. Fixed bug #74053 (Corrupted class entries on shutdown when a destructor

  spawns another object). (jim at commercebyte dot com)

. Fixed bug #73971 (Filename got limited to MAX_PATH on Win32 when scan

  directory). (Anatol)

. Fixed bug #74149 (static embed SAPI linkage error). (krakjoe)

. Fixed bug #72359, bug #72451, bug #73706, bug #71115 and others related

  to interned strings handling in TS builds. (Anatol, Dmitry)

. Implemented "Trailing Commas In List Syntax" RFC for group use lists only.

  (Sammy Kaye Powers)

. Fixed bug #74269 (It's possible to override trait property with different

  loosely-equal value). (pmmaga)

. Fixed bug #61970 (Restraining __construct() access level in subclass gives

  a fatal error). (pmmaga)

. Fixed bug #63384 (Cannot override an abstract method with an abstract

  method). (pmmaga, wes)

. Fixed bug #74607 (Traits enforce different inheritance rules). (pmmaga)

. Fixed misparsing of abstract unix domain socket names. (Sara)

 - BCMath:

. Fixed bug #46564 (bcmod truncates fractionals). (liborm85)

 - Calendar:

. Fix integer overflows (Joshua Rogers)

 - Date:

. Fixed bug #55407 (Impossible to prototype DateTime::createFromFormat).

  (kelunik)

. Fixed bug #69587 (DateInterval properties and isset). (jhdxr)

. Fixed bug #74404 (Wrong reflection on DateTimeZone::getTransitions).

  (krakjoe)

. Fixed bug #74080 (add constant for RFC7231 format datetime). (duncan3dc)

. Fixed bug #74639 (implement clone for DatePeriod and DateInterval).

  (andrewnester)

. Implemented FR #71520 (Adding the DateTime constants to the

  DateTimeInterface interface). (Majkl578)

 - Dba:

. Fixed bug #72885 (flatfile: dba_fetch() fails to read replaced entry).

  (Anatol)

 - DOM:

. Fixed bug #67474 (getElementsByTagNameNS filter on default ns). (aboks)

. Fixed bug #54382 (getAttributeNodeNS doesn't get xmlns* attributes).

  (aboks)

. Fixed bug #74004 (LIBXML_NOWARNING (etc) ignored by DOMDocument::loadHTML).

  (somedaysummer)

 - EXIF:

. Added support for vendor specific tags for the following formats:

  Samsung, DJI, Panasonic, Sony, Pentax, Minolta, Sigma/Foveon, AGFA, 

Kyocera, Ricoh & Epson. (Kalle)

. Fixed bug #72682 (exif_read_data() fails to read all data for some

  images). (Kalle)

. Fixed bug #71534 (Type confusion in exif_read_data() leading to heap

  overflow in debug mode). (hlt99 at blinkenshell dot org, Kalle)

. Fixed bug #68547 (Exif Header component value check error).

  (sjh21a at gmail dot com, Kalle)

. Fixed bug #66443 (Corrupt EXIF header: maximum directory nesting level

  reached for some cameras). (Kalle)

. Fixed Redhat bug #1362571 (PHP not returning full results for

  exif_read_data function). (Kalle)

 - FPM:

. Configuration to limit fpm slow log trace callers. (Sannis)

. Fixed bug #69865 (php-fpm does not close stderr when using syslog). 

  (Mike)

 - FTP:

. Fixed bug #74598 (ftp:// wrapper ignores context arg). (Sara)

. Implement MLSD for structured listing of directories. (blar)

 - GD:

. Implemented imageresolution as getter and setter (Christoph)

. Fixed bug #74343 (compile fails on solaris 11 with system gd2 library).

  (krakjoe)

 - GMP:

. Fixed bug #70896 (gmp_fact() silently ignores non-integer input). (Sara)

 - hash:

. Fixed bug #73961 (environmental build dependency in hash sha3 source).

  (krakjoe)

. Changed HashContext from resource to object. (Rouven Weßling, Sara)

 - intl:

. Fixed bug #74433 (wrong reflection for Normalizer methods). (villfa)

. Fixed bug #74439 (wrong reflection for Locale methods). (villfa)

. Fixed bug #74468 (wrong reflection on Collator::sortWithSortKeys). (villfa)

. Fixed bug #63790 (test using Spoofchecker which may be unavailable). (Sara)

 - Mbstring:

. Implemented request #66024 (mb_chr() and mb_ord()). (Masakielastic, Yasuo)

. Implemented request #65081 (mb_scrub()). (Masakielastic, Yasuo)

. Implemented request #69086 (enhancement for mb_convert_encoding() that

  handles multibyte replacement char nicely). (Masakielastic, Yasuo)

. Added array input support to mb_convert_encoding(). (Yasuo)

. Added array input support to mb_check_encoding(). (Yasuo)

. Fixed bug #69079 (enhancement for mb_substitute_character). (masakielastic)

. Update to oniguruma version 6.3.0. (Remi)

 - Mcrypt:

. The deprecated mcrypt extension has been moved to PECL. (leigh)

 - MySQLi:

. Fixed bug #73949 (leak in mysqli_fetch_object). (krakjoe)

 - mysqlnd:

. Fixed bug #73800 (sporadic segfault with MYSQLI_OPT_INT_AND_FLOAT_NATIVE). 

(vanviegen)

 - OpenSSL:

. Fixed bug #71519 (add serial hex to return value array). (xrobau)

 - PCRE:

. Added support for PCRE JIT fast path API. (dmitry)

. Fixed bug #61780 (Inconsistent PCRE captures in match results). (cmb)

 - PDO:

. Add "Sent SQL" to debug dump for emulated prepares. (Adam Baratz)

. Add parameter types for national character set strings. (Adam Baratz)

 - PDO_DBlib:

. Fixed bug #73234 (Emulated statements let value dictate parameter type).

  (Adam Baratz)

. Fixed bug #73396 (bigint columns are returned as strings). (Adam Baratz)

. Expose DB-Library version as \PDO::DBLIB_ATTR_VERSION attribute on \PDO

  instance. (Adam Baratz)

. Add test coverage for bug #72969. (Jeff Farr)

 - PDO_OCI:

. Fixed bug #54379 (PDO_OCI: UTF-8 output gets truncated). (gureedo / Oracle)

 - PDO_PgSQL:

. Fixed bug #73959 (lastInsertId fails to throw an exception for wrong 

  sequence name). (andrewnester)

 - PDO_Sqlite

. Switch to sqlite3_prepare_v2() and sqlite3_close_v2() functions (rasmus)

 - phar:

. Fixed bug #74383 (phar method parameters reflection correction). 

  (mhagstrand)

. Fixed bug #74196 (phar does not correctly handle names containing dots).

  (mhagstrand)

. Fixed bug #74386 (Phar::__construct reflection incorrect). (villfa)

 - PHPDBG

. Added extended_value to opcode dump output. (Sara)

 - posix:

. Fixed bug #71219 (configure script incorrectly checks for ttyname_r). (atoh)

 - Session:

. Fixed bug #73461 (Prohibit session save handler recursion). (Yasuo)

. PR #2233 Removed register_globals related code and "!" can be used as $_SESSION key name. (Yasuo)

. Improved bug #73100 fix. 'user' save handler can only be set by session_set_save_handler()

. Fixed bug #69582 (session not readable by root in CLI). (EvgeniySpinov)

 - SOAP:

. Fixed bug #69137 (Peer verification fails when using a proxy with SoapClient)

  (Keith Smiley)

 - SQLite3:

. Update to Sqlite 3.18.0. (cmb)

. Fixed bug #74413 (incorrect reflection for SQLite3::enableExceptions).

  (krakjoe)

 - Standard:

. Add subject to mail log. (tomsommer)

. Fixed bug #31875 (get_defined_functions additional param to exclude

disabled functions). (willianveiga)

. Fixed bug #69442 (closing of fd incorrect when PTS enabled). (jaytaph)

. Fixed bug #72974 (imap is undefined service on AIX). (matthieu.sarter)

. Fixed bug #72979 (money_format stores wrong length AIX). (matthieu.sarter)

. Fixed bug #74300 (unserialize accepts two plus/minus signs for float number exponent part).

  (xKerman)

. Fixed bug #74556 (stream_socket_get_name() returns '\0'). (Sara)

 - XML:

. Moved utf8_encode() and utf8_decode() to the Standard extension. (Andrea)

. Fixed bug #72135 (malformed XML causes fault) (edgarsandi)

 - xmlreader:

. Fixed bug #74457 (Wrong reflection on XMLReader::expand). (villfa)

 - XMLRPC:

. Use Zend MM for allocation in bundled libxmlrpc (Joe)

 - ZIP:

. Add support for encrypted archives. (Remi)

. Use of bundled libzip is deprecated, --with-libzip option is recommended. (Remi)

. Fixed Bug #73803 (Reflection of ZipArchive does not show public properties). (Remi)