Depending on your needs, you should consider using filter_var() with the FILTER_VALIDATE_BOOLEAN flag.filter_var( 'true', FILTER_VALIDATE_BOOLEAN); // true filter_var( 1, FILTER_VALIDATE_BOOLEAN);…
For example:
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://6.6.6.6:80;
proxy_set_header Authorization "Basic a2luZzppc25ha2Vk";
}
«a2luZzppc25ha2Vk» is «king:isnaked» base64 encoded, so that would work for