Step1: Install ssl certificate in server
Step2: Activate the ssl using plugin or code
Step3: Update the .htaccess file
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://site url /$1 [R=301,L]Example
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://www.vicarageboutiquehotel.co.uk/$1 [R=301,L]
Step4: Implement 301 redirections of images ,files and all pages
Step5: Tested the mixed content issue
Step6: Tested the database and files in http static urls change