PHP 5.5.7/5.4.23/5.3.28紧急发布.2013-12-13.上个版本是2013-11-14的5.5.6/5.4.22。全部修正了一个 OpenSSL的安全漏洞（CVE-2013-6420）5.3本来已停止常规开发也更新了。 总共修正了10几个Bug(包括Opcache的几个Bug)及安全漏洞。
完全改进：
Version 5.5.7
12-Dec-2013
Core:
Fixed bug #66094 (unregister_tick_function tries to cast a Closure to a string).
Fixed bug #65969 (Chain assignment with T_LIST failure).
CLI server:
Added some MIME types to the CLI web server.
Implemented FR #65917 (getallheaders() is not supported by the built-in web server) - also implements apache_response_headers()
OPCache:
Fixed bug #66176 (Invalid constant substitution).
Fixed bug #65915 (Inconsistent results with require return value).
Fixed bug #65559 (Opcache: cache not cleared if changes occur while running).
readline:
Fixed bug #65714 (PHP cli forces the tty to cooked mode).
Openssl:
Fixed memory corruption in openssl_x509_parse() (CVE-2013-6420).
Version 5.4.23
12-Dec-2013
Core:
Fixed bug #66094 (unregister_tick_function tries to cast a Closure to a string).
Fixed bug #65947 (basename is no more working after fgetcsv in certain situation).
JSON:
Fixed whitespace part of #64874 ("json_decode handles whitespace and case-sensitivity incorrectly").
MySQLi:
Fixed bug #66043 (Segfault calling bind_param() on mysqli).
mysqlnd:
Fixed bug #66124 (mysqli under mysqlnd loses precision when bind_param with 'i').
Fixed bug #66141 (mysqlnd quote function is wrong with NO_BACKSLASH_ESCAPES after failed query).
OpenSSL:
Fixed memory corruption in openssl_x509_parse() (CVE-2013-6420). (Stefan Esser).
PDO:
Fixed bug #65946 (sql_parser permanently converts values bound to strings).
Version 5.3.28
12-Dec-2013
Openssl:
Fixed handling null bytes in subjectAltName (CVE-2013-4073).
Fixed memory corruption in openssl_x509_parse() (CVE-2013-6420). (Stefan Esser).
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