centos - nginx and php-fpm startup problem (not unable to start)

I encountered a very painful thing, centOS7.2, the lnmp environment installed by yum.
nginx is compiled and installed and placed in the /usr/local/nginx directory.
Problems encountered so far:
1. Starting through service nginx start and service php-fpm start is normal, closing everything is normal, but the php file cannot be found. As long as the php file is accessed, it is file not found, and accessing static files is normal. . There are no errors in the configuration file at all, as shown in 2.
2, start directly through /usr/local/nginx/sbin/nginx, that is, the executable file, and also directly start php-fpm, so there will be no problem, and access to any page will be normal.
3. The weirdest thing is that those opened directly through nginx can only be closed through kill or nginx -s stop, and cannot be closed through service or systemctl, while those opened through service can be closed through nginx -s stop. The same goes for php-fpm.
As follows:

<code>[root@vikie-pc web]# ps -ef |grep php
root      4988     1  0 16:24 ?        00:00:00 php-fpm: master process (/etc/php-fpm.conf)
www       4989  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4990  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4991  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4992  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4993  4988  0 16:24 ?        00:00:00 php-fpm: pool www
root      5020     1  0 16:25 ?        00:00:00 php-fpm: master process (/etc/php-fpm.conf)
www       5028  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5030  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5032  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5033  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5035  5020  0 16:25 ?        00:00:00 php-fpm: pool www
root      5231 27194  0 16:25 pts/1    00:00:00 grep --color=auto php

</code>

God, who can help me? It’s been a whole day.
I suspect it may be a problem with user permissions, but I don’t know much about it, so I’m completely confused

Reply content:

I encountered a very painful thing, centOS7.2, the lnmp environment installed by yum.
nginx is compiled and installed and placed in the /usr/local/nginx directory.
Problems encountered so far:
1. Starting through service nginx start and service php-fpm start is normal, closing everything is normal, but the php file cannot be found. As long as the php file is accessed, it is file not found, and accessing static files is normal. . There are no errors in the configuration file at all, as shown in 2.
2, start directly through /usr/local/nginx/sbin/nginx, that is, the executable file, and also directly start php-fpm, so there will be no problem, and access to any page will be normal.
3. The weirdest thing is that those opened directly through nginx can only be closed through kill or nginx -s stop, and cannot be closed through service or systemctl, while those opened through service can be closed through nginx -s stop. The same goes for php-fpm.
As follows:

<code>[root@vikie-pc web]# ps -ef |grep php
root      4988     1  0 16:24 ?        00:00:00 php-fpm: master process (/etc/php-fpm.conf)
www       4989  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4990  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4991  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4992  4988  0 16:24 ?        00:00:00 php-fpm: pool www
www       4993  4988  0 16:24 ?        00:00:00 php-fpm: pool www
root      5020     1  0 16:25 ?        00:00:00 php-fpm: master process (/etc/php-fpm.conf)
www       5028  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5030  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5032  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5033  5020  0 16:25 ?        00:00:00 php-fpm: pool www
www       5035  5020  0 16:25 ?        00:00:00 php-fpm: pool www
root      5231 27194  0 16:25 pts/1    00:00:00 grep --color=auto php

</code>

God, who can help me? It’s been a whole day.
I suspect it may be a problem with user permissions, but I don’t know much about it, so I’m completely confused

Solved, due to selinux permissions issue, php-fpm access has been blocked. You can turn off selinux or add the php-fpm service to the selinux whitelist

If the static page can be accessed, it is probably because the nginx configuration file is not configured properly. The configuration file is in the nginx installation directory/etc/nginx.conf