nginx 400 bad request error
In nginx.conf, increase both client_header_buffer_size and large_client_header_buffers to alleviate this problem.
The main configuration is client_header_buffer_size. The default is 1k, so if the header is less than 1k, there will be no problem.
According to my current configuration:
client_header_buffer_size 16k;
large_client_header_buffers 4 64k;
It should be noted that large_ client_header_buffers 4 This 4 is not a numerical value
The above introduces the nginx 400 bad request error, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.

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