php版本切换的详细过程+线上Linux环境下常见php-fpm常见问题

一、php版本切换（1）检测是否切换成功 判断是否切换成功的2个绝对正确的方法(推荐第一种)：1、ps -ef|grep php2、写个php文件 <?php echo phpinfo(); ?> 
（2）已有的版本切换现有php7.0和php7.1,目前在php7.0==========法1,亲测有效，start=================== brew services stop php70 ps -ef |grep php brew services restart php@7.1 ps -ef |grep php==========法1，end==========================
==========法2，start=========================brew unlink php70brew link php71source ~/.bash_profile php -v 此时显示的版本就是php7.1的了 


解决： 按照提示操作即可brew link php71 —forceecho 'export PATH="/usr/local/opt/php@7.1/bin:$PATH"' >> ~/.bash_profileecho 'export PATH="/usr/local/opt/php@7.1/sbin:$PATH"' >> ~/.bash_profile==========法2，start=========================
（3）安装新的php版本，比如5.6，并切换到该版本 ps -ef|grep php    //当前是一堆php@7.1的进程，需要杀死掉brew services stop php@7.1ps -ef|grep php   //在查看，已经杀完了brew install php56或者brew install php@5.6  //若报错，表示没此版本，不报错就已经在安装了brew services restart php@5.6   //启用当前版本

（4）两个重要文件~/.bash_profile       ==配置文件~/.bash_aliases      ==快捷键文件
~/.bash_aliases的文件的内容alias nginx.start='launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist'alias nginx.stop='launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist'alias nginx.restart='nginx.stop && nginx.start'alias php-fpm70.start="launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.php70.plist"alias php-fpm70.stop="launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.php70.plist"alias php-fpm70.restart='php-fpm70.stop && php-fpm70.start'alias php-fpm71.start="launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.php71.plist"alias php-fpm71.stop="launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.php71.plist"alias php-fpm71.restart='php-fpm71.stop && php-fpm71.start'alias mysql.start="launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist"alias mysql.stop="launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist"alias mysql.restart='mysql.stop && mysql.start'分析：

快捷键	实际命令
nginx.start	launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist

二、线上Linux环境下常见php-fpm常见问题


解决：http://www.mamicode.com/info-detail-1157161.html 


解决：1、Gracefully shutting down php-fpm warning, no pid file found - php-fpm is not running ?关闭php-fpm服务时发现报错，缺乏pid文件，解决方法为编辑配置文件，启用pid文件:vim /usr/local/php/etc/php-fpm.confpid = run/php-fpm.pid2、ERROR : failed to open error_log……..vim /usr/local/php/etc/php-fpm.conferror_log = /usr/local/php/log/php-fpm.log然后 cd /usr/local/php/ ,然后创建log文件夹，赋777权限，然后再到log文件夹里创建php-fpm.log文件





http://d-prototype.com/archives/6230造成该问题的原因是：路径【/usr/local/php-7.0.9/etc/php-fpm.d/】下没有找到【*.conf】的配置文件（config file）。解决：cp www.conf.default www.conf





vim /usr/local/php/etc/php-fpm.d/www.conf





解决：打开php-fpm的配置文件/usr/local/php/etc/php-fpm.d/www.conf找到这2条并取消注释：listen.allowed_clients = 127.0.0.1listen = 127.0.0.1:9000该解决方案将使您能够在您的虚拟主机块中使用listen = 127.0.0.1:9000然后重启： service php-fpm restart 

三、参考：mac下安装多版本PHP及切换https://blog.csdn.net/a_new_steven/article/details/78652585 
Linux下安装多版本PHP及切换https://www.cnblogs.com/Julian-Chen/articles/7987003.htmlhttps://www.cnblogs.com/oliverCJ/p/7831526.html http://blog.csdn.net/21aspnet/article/details/47658127/