PHP 7.0.2 正式版发布_php实例
七年以来，PHP一直是第四大最流行的编程语言，驱动全球超过2亿多个网站，全球超过81.7%的公共网站在服务器端采用PHP。PHP在这个星期有了自2004年以来最大的飞跃，因为PHP 7已经发布。 PHP 7最大特色是极大地改进了性能，在一些WordPress基准测试当中，性能可以达到PHP 5.6的3倍。
下载地址:
PHP 7.0.2 Final for Windows 32-bit (14.59 MB)
PHP 7.0.2 Final for Windows 64-bit (14.59 MB)
PHP 7.0.2 Final for Linux (10.52 MB)
PHP 7还有其他一些比较小的改进，比如显著减少内存使用，添加返回类型声明等等功能。PHP 7包含了一些重大安全改进，如除去PHP安全模式，添加魔术引号，有一些新的保留关键字等等。这意味着像WordPress等Web应用程序需要局部重新设计，以便为PHP 7发布做好准备，现在WordPress看起来已经完全兼容PHP 7。
虽然PHP 7已经发布，但是广泛采用还需要数年之久，Web应用，特别是针对企业的Web应用，要花费几年时间才能升级到新版本平台。然而，很多Web开发人员都认为，PHP 7巨大的性能改进对他们很有吸引力。
Version 7.0.2
07 Jan 2016
Core:
Fixed bug #71165 (-DGC_BENCH=1 doesn't work on PHP7).
Fixed bug #71163 (Segmentation Fault: cleanup_unfinished_calls).
Fixed bug #71109 (ZEND_MOD_CONFLICTS("xdebug") doesn't work).
Fixed bug #71092 (Segmentation fault with return type hinting).
Fixed bug memleak in header_register_callback.
Fixed bug #71067 (Local object in class method stays in memory for each call).
Fixed bug #66909 (configure fails utf8_to_mutf7 test).
Fixed bug #70781 (Extension tests fail on dynamic ext dependency).
Fixed bug #71089 (No check to duplicate zend_extension).
Fixed bug #71086 (Invalid numeric literal parse error within highlight_string() function).
Fixed bug #71154 (Incorrect HT iterator invalidation causes iterator reuse).
Fixed bug #52355 (Negating zero does not produce negative zero).
Fixed bug #66179 (var_export() exports float as integer).
Fixed bug #70804 (Unary add on negative zero produces positive zero).
CURL:
Fixed bug #71144 (Sementation fault when using cURL with ZTS).
DBA:
Fixed key leak with invalid resource.
Filter:
Fixed bug #71063 (filter_input(INPUT_ENV, ..) does not work).
FTP:
Implemented FR #55651 (Option to ignore the returned FTP PASV address).
FPM:
Fixed bug #70755 (fpm_log.c memory leak and buffer overflow).
GD:
Fixed bug #70976 (Memory Read via gdImageRotateInterpolated Array Index Out of Bounds).
Mbstring:
Fixed bug #71066 (mb_send_mail: Program terminated with signal SIGSEGV, Segmentation fault).
Opcache:
Fixed bug #71127 (Define in auto_prepend_file is overwrite).
PCRE:
Fixed bug #71178 (preg_replace with arrays creates [0] in replace array if not already set).
Readline:
Fixed bug #71094 (readline_completion_function corrupts static array on second TAB).
Session:
Fixed bug #71122 (Session GC may not remove obsolete session data).
SPL:
Fixed bug #71077 (ReflectionMethod for ArrayObject constructor returns wrong number of parameters).
Fixed bug #71153 (Performance Degradation in ArrayIterator with large arrays).
Standard:
Fixed bug #71270 (Heap BufferOver Flow in escapeshell functions).
WDDX:
Fixed bug #70661 (Use After Free Vulnerability in WDDX Packet Deserialization).
Fixed bug #70741 (Session WDDX Packet Deserialization Type Confusion Vulnerability).
XMLRPC:
Fixed bug #70728 (Type Confusion Vulnerability in PHP_to_XMLRPC_worker).
PHP 7.0.2正式版发布：WordPress速度提升3倍！
提到PHP，肯定会有人说这是世界上最好的编程语言。单说流行程度，目前全球超过81.7%的服务器后端都采用了PHP语言，它驱动着全球超过2亿多个网站。上月初PHP7正式版发布，迎来自2004年以来最大的版本更新。现在，PHP 7.0.2又正式发布。
PHP7最显著的变化就是性能的极大提升，已接近Facebook开发的PHP执行引擎HHVM。在WordPress基准性能测试中，速度比5.6版本要快2~3倍，大大减少了内存占用。PHP7在语言上也有一些变化，比如添加返回类型声明、增加了一些新的保留关键字等。在安全方面，去除了PHP安全模式，添加魔术引号等。不仅如此，新版还支持64位，而且包含最新版Zend引擎。
虽然已正式发布，但PHP7的普及还需要很长时间，很多Web托管服务、企业Web应用出于兼容性考虑，在未来很长一段时间内可能都还会继续使用旧版本。不过，目前来看，全球最流行的PHP博客平台WordPress已经为PHP7最好了准备。
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