Why doesn't header location work with error_page in nginx?

Question

PHP

On my site, when there was still Apache, in .htaccess with a 404 error, index.php was loaded with a redirect to another site in the form:

header("Location: http://site.ru{$_SERVER['REQUEST_URI']}");

When moving to nginx, redirection simply stopped working.
PS In nginx I specified "error_page 404 /index.php;"
What's my mistake?

Answer 1

server {
        server_name  site1.ru;

        rewrite ^(.*) http://site2.ru/$1 permanent;
    }

server {
        server_name  www.site.ru;

        rewrite ^(.*) http://site.ru/$1 permanent;
    }

redirect 30x
error 40x it is
impossible to transmit two response codes at the same time
The fact that Apache allowed this does not mean that it is right to do so.
nginx doesn't allow you to do this.