nginx,php 502错误解决

一：错误场景：leyangjun-cc-web.com/api/cc/callback.php 访问返回502php   二：Nginx错误报错为：html 2018/10/22 18:07:09 [crit] 775#0: *41 connect() to unix:/var/run/php7.0-fpm.sock failed (2: No such file or directory) wh

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