Is this .htaccess written in the correct order?

Question

Hey all for my website I require some .htaccess settings. Some for php and some to redirect to https from http.

I don't know if they are in the right order, will this work?

.htaccess:

RewriteEngine On
RewriteCond %{HTTP:X-Forwarded-Proto} !https
SetEnvIf X-Forwarded-Proto "https" HTTPS=on
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
php_value upload_max_filesize 900M
php_value post_max_size 900M
php_value max.execution_time 900

Anything I need to change for it to work?

Thanks :)