htaccess

RewriteEngine On

Options -MultiViews
RewriteEngine On
RewriteBase /social_media/

# settings page request
RewriteCond %{THE_REQUEST} /settings\.php [NC]
RewriteRule	^ settings%1/? [R=302,L,NE]

# user page request
RewriteCond %{THE_REQUEST} /user\.php\?u=([^\s&]+) [NC]
RewriteRule ^ user/%1/? [R=302,L,NE]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{THE_REQUEST} \s/+(.*?)[^/][?\s]
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R=301]

RewriteRule ^user/([^/.]+)/$ user.php?u=$1 [L,QSA,NC]