Nginx if (! -E) problem [emerg]: unknown directive "if (! -E "in

1. I have encountered nginx url rewriting problems

Nano/usr/local/nginx/conf/nginx. conf

If (! -E $ request_filename ){

# Here are some url rewriting rules

}
When the instance is restarted, the following error occurs: [emerg]: unknown directive "if (! -E "in/usr/local/nginx/conf/nginx. conf: 124

II. Problem solving

The problem is that there must be a space between if and (
Should be changed:

If (! -E $ request_filename ){

# Here are some url rewriting rules

}