上传一个20M文件的时候php报如下错误，是php上传文件大小限制引起

POST Content-Length of 19248654 bytes exceeds the limit of 8388608 bytes in

修改php配置文件如下，重启php即可

vi /usr/local/php/lib/php.ini

upload_max_filesize = 50M
post_max_size = 100M
memory_limit = 128M
max_execution_time = 600
max_input_time = 300

重启

killall php-fpm 
/usr/local/php/sbin/php-fpm