Php 5.3发布
PHP 5.3.4 特性： 增加对zip 流的统计支持 新增 follow_location (默认启用)支持 增加一个 3rd parameter to get_html_translation_table Implemented FR #52348, added new constant ZEND_MULTIBYTE to detect zend multibyte at runtime. Multiple improvements to the FPM SAPI. 修复 100 多处bug
HP 5.3系列版本对PHP做了很多改进，同样的php代码，在php5.3下，opcode 的尺寸减小很多。可以提升性能。
5.3.3将PHP的语法做了一些规范 的工作。并且引入了fpm的sapi.
FPM 使得php本身就是一个非常强壮的web server.通过一个master管理动态的worker进程池，用过fastcgi前置进行流水化处理。
5.3.4的发布伴随 apc3.1.6 稳定版的发布,apc 是一个opcode cache.
Opcode 可以理解为java 的class文件。APC则是将Opcode存储在内存当中，给worker进程共享。
Worker 可以设定为完成一定数量的工作，退出。master进程会派生新的进程替代退出的worker.
并且根据负载情况，调整worker的数量，可以设定阀值。
PHP 早已经不是简单的 解释型语言了，可以看作是一个 C/C++的桥语言。
非常健壮!
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