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用ZendEncode编写开发PHP程序_PHP

Jun 01, 2016 pm 12:35 PM
zend develop program write compile

作者薛启康
  Zend Encode的工作原理



  使用PHP的人都知道
它是一个脚本编程工具用它写的程序必须以源码的形式放置在Web服务器上所以我们无法保护自己的源代码。大家都知道任何一个脚本程序的执行效率同具有相同功能的编译好的二进制代码相比较它的执行效率都是比较低的。那么要是有一个工具能够帮我们把用PHP写的程序编译成二进制代码就好了这样不但执行效率提高了&nb

sp
;

运行速度也加快了。真要是有这么一个工具
那就是一举两得了。



  现在这不是梦想了
Zend Encode就是为此而开发的,它可以直接将脚本编译成二进制码。有了Zend Encode你就可以将自己写好的PHP程序编译后分发给很多用户而用不着公开自己的源程序代码。编译好的二进制代码可以被Zend Optimizer透明读取也就是说客户只要在他的服务器上安装Zend Optimizer就可以执行由Zend Encode编译好的PHP程序。编译程序中包含有Zend Optimizer的部分代码所以编译过程中对程序代码进一步作了优化处理这即意味着脚本的执行效率提高了。



  从一定意义上讲
Zend Encode是一个“PHP编译器”。但是它又不是一个真正意义上的编译器因为真正编译完成的程序可以脱离原来的编译环境运行而Zend Encode编译过的程序需要有Zend Optimizer的支持。就像编译好的Java二进制代码需要JVM的支持。所以Zend Optimizer可以看作是PHP编译好代码的虚拟机。不管怎么说它们要通过相互配合使用。



  目前Zend Encode支持的操作系统有
Solaris、Linux、FreeBSD及Windows。Zend Encode可以直接运行电脑系统中不一定非要安装PHP。



  Zend Encode的安装



  先去下载一个软件包吧
!Zend Encode不是自由软件使用它要付费而且价格相当高。幸好zend.com提供了一个可供试用的软件包用户可以免费试用30天。这个软件包可以直接从www.zend.com上获得。所以首先要到www.zend.com上下载Zend Encode、Zend Optimizer软件包。其次要下载一个授权文件license。由于Zend Encode是一个授权使用的产品所以需要用户从zend.com上申请一个license。申请步骤如下



  要申请一个试用的license
需要向zend.com提供你正在使用的计算机的ID也即在申请页中填写host ID(实际上就是你计算机上的网卡的MAC地址)。查看计算机ID的方法如下从zend.com下载一个lmutil.z的程序解压后得到程序lmutil运行它它会根据系统的硬件特征产生一个序列串。将这个序列号填入到申请license页的host ID中zend.com会在48小时内为用户生成一个license下载此license文件文件名为zendEncode.dat它只能在这台电脑上使用。



  1
.将Zend Encode软件包也解压缩到/usr/local/Zend目录下。解压缩完成后目录下多了一个zendenc的文件它就是那个“编译器”啦。



  2
.将那个license文件复制到/usr/local/Zend目录下安装完成。



  Zend Optimizer的安装



  完成了Zend Encode的安装
才完成了一半任务要使用编译后的PHP二进制代码还要安装一个解释器——Zend Optimizer有了它的支持编译后的PHP二进制文件才能被正确地执行。



  与Zend Encode不同
Zend Optimizer是一个免费软件它的主要功能是加速PHP脚本文件的运行。据Zend.com称有了Zend Optimizer的优化程序的执行效率可以提高600%经过笔者的简单测试执行效率的确是提高了不少。 
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