这个主要是用来记录自己在使用过程中遇到的一些小问题的，以后有问题慢慢加
php出现It is not safe to rely on the system’s timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected ‘Asia/Chongqing’ for ‘CST/8.0/no DST’ instead，问题
原因：PHP未设置时区
解决：php.ini中增加：date.timezone = "Asia/Shanghai"
nginx报错：has been denied (see security.limit_extensions)" while reading response header from upstream,
修改php-fpm：在security.limit_extensions=.php .php3 .php4 .php5 .gif .jpg .bmp .swf .png .js .css .jpeg .png .htm .html