[原创]配置php+nginx 时遇到的”file not found","access denied"奇怪问题的解决过程

在centos 7中按照我的随笔转载文章"[转载]CentOS 下安装LEMP服务(Nginx、MariaDB/MySQL和PHP)"安装好后，结果无法显示phpinfo()信息，出现过“file not found","No iput file is specifed","access denied"等各种奇怪错误，百度了各种文章都说是/etc/nginx/conf.d/default.conf配置里的路径root配置不正确造成的，但检查了几千遍也没发现有问题。经过查看/var/logs/nginx/error.log日志发现了问题所在：

2015/03/23 20:54:57 [error] 3246#0: *4 FastCGI sent in stderr: "PHP message: PHP Warning: Unknown: open_basedir restriction in effect. File(/usr/share/nginx/html/test.php) is not within the allowed path(s): (.:/tmp/) in Unknown on line 0
PHP message: PHP Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0
Unable to open primary script: /usr/share/nginx/html/test.php (Permission denied)" while reading response header from upstream, client: 192.168.1.101, server: localhost, request: "GET /test.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "192.168.1.107"
2015/03/23 20:54:57 [error] 3246#0: *4 FastCGI sent in stderr: "PHP message: PHP Warning: Unknown: open_basedir restriction in effect. File(/usr/share/nginx/html/test.php) is not within the allowed path(s): (.:/tmp/) in Unknown on line 0

很显然问题在php.ini的open_basedir限制了能够读取的文件夹，只设置了open_basedir=.:/tmp/,而/usr/share/nginx/html/没有在其中，将目录加入一切正常。