php线程安全版和非线程安全版应该用哪个？
php线程安全版和非线程安全版应该用哪个，它们分别的使用场景是什么？
回复内容：
php线程安全版和非线程安全版应该用哪个，它们分别的使用场景是什么？
PHP所推出的Thread Safe主要针对的是Windows下以IIS来运行PHP的情况，因为Windows中频繁申请进程开销较大，所以在Windows中要以多线程方式来运转PHP，这时候就需要Thread Safe版本。而在Linux系统下，PHP绝大多数情况下都以多进程方式运行，所以直接使用None Thread Safe即可。
如果是使用ISAPI的方式来运行PHP就必须用Thread Safe(线程安全)的版本；而用FastCGI模式运行PHP的话就没有必要用线程安全检查了，用None Thread Safe(NTS，非线程安全)的版本能够更好的提高效率。
原因：
http://astar.baidu.com/forum/forum.php?mod=viewthread&tid=366
如果有多线程，就用线程安全版；
如果只有一个线程，就用非线程安全版。
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