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php 安装dll 的注意事项

Jun 20, 2016 pm 01:01 PM
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php 安装dll 的注意事项:

1.注意版本

5.2 - 5.3 

2.VC6 or VC9

一、如何选择PHP5.3的VC9版本和VC6版本

 

    VC6版本是使用Visual Studio 6编译器编译的,如果你的PHP是用Apache来架设的,那你就选择VC6版本。

 

    VC9版本是使用Visual Studio 2008编译器编译的,如果你的PHP是用IIS来架设的,那你就选择VC9版本。

 

3. Thread Safe or Non Thread Safe

 

二、如何选择PHP5.3的Thread Safe和Non Thread Safe版本

 

    先从字面意思上理解,Thread Safe是线程安全,执行时会进行线程(Thread)安全检查,以防止有新要求就启动新线程的CGI执行方式而耗尽系统资源。Non Thread Safe是非线程安全,在执行时不进行线程(Thread)安全检查。

 

    再来看PHP的两种执行方式:ISAPI和FastCGI。

 

    ISAPI执行方式是以DLL动态库的形式使用,可以在被用户请求后执行,在处理完一个用户请求后不会马上消失,所以需要进行线程安全检查,这样来提高程序的执行效率,所以如果是以ISAPI来执行PHP,建议选择Thread Safe版本;

 

    而FastCGI执行方式是以单一线程来执行操作,所以不需要进行线程的安全检查,除去线程安全检查的防护反而可以提高执行效率,所以,如果是以FastCGI来执行PHP,建议选择Non Thread Safe版本。


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