php历程安全
php进程安全?
php是对进程一个一个处理,还是多进程处理,如果是多进程,那进程安全吗?fastcgi模式下为什么快
------解决方案--------------------
啥叫Php对进程处理。
php解释器是一个进程,解释执行一个PHP脚本,然后销毁掉进程。
多进程当然安全,又不共享东西,共享的也加锁了。
fastcgi是因为PHP解释器作为服务端程序监听网络连接,不再频繁创建与销毁了。
------解决方案--------------------
楼上的正解
------解决方案--------------------
一个进程对应一个PHP解释器。php-fpm就是一款进程管理器,启动时初始化N个进程(默认为10个好像),然后这N个进程就负责脚本的处理,除非php-fpm重启或停止,这N个进程将一直活着,处理完一个请求后等待php-fpm分配下一个请求,省去了频繁进行进程销毁和创建的开销
------解决方案--------------------
单例是掩耳盗铃,一个fcgi进程只能执行一个脚本, 你的单例是多进程间的, 没法共享, 何来单例。

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