PHP:Maximum number of allowable file uploads has been exceeded in Unknown on line 0 错误的解决办法

批量上传时 php 报错：PHP:Maximum number of allowable file uploads has been exceeded in Unknown on line 0，原因是 php 中 max_file_uploads 的默认配置过小。

解决办法：修改 php.ini 文件中 max_file_uploads 的配置值，从默认 20 修改到合适的值，比如说我修改成 100，保存后重启服务器即可。