htaccess rewrite url and redirect - php

Question

I am wondering how to rewrite this url profile.php?user=1 to /user/1.
I know that this can be done by .htaccess. Here is what i have tried and it worked fine but the only problem is that it
RewriteCond %{THE_REQUEST} \s/+profile\.php\?user=([^\s&]+) [NC]
RewriteRule ^ /%1? [R=302,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^/]+)/?$ profile.php?user=$1 [L,QSA]
Besides these codes, my .htacces also has these lines
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain.*$ [NC]
RewriteRule \.(gif|jpg|png)$ http://www.domain.com [L]
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
ErrorDocument 404 /error404.php
ErrorDocument 403 /error404.php
Options -Indexes
RewriteCond %{THE_REQUEST} \s/+page\.php\?pagename=([^\s&]+) [NC]
RewriteRule ^ /%1? [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ /page.php?pagename=$1 [L,QSA]
Please also tell me if my .htaccess page is correct. I am not good at htaccess

Answer 1

Change this:
RewriteCond %{THE_REQUEST} \s/+profile\.php\?user=([^\s&]+) [NC]
RewriteRule ^ /%1? [R=302,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^/]+)/?$ profile.php?user=$1 [L,QSA]
to:
RewriteCond %{THE_REQUEST} \s/+profile\.php\?user=([^\s&]+) [NC]
RewriteRule ^ /user/%1? [R=302,L]
RewriteRule ^user/([^/]+)/?$ profile.php?user=$1 [L,QSA]
And make sure the page has either absolute links or add this to the page's header:
<base href="/" />
otherwise, all your links will be broken.

Answer 2

In htacess rewrite you want to in fact redirect a url structure to a different url
If you have a link to profile.php?user=1 you will have to change this like to this : profile.php/user/1 then tell your htacess to redirect this adresse to this profile.php?user=1
You can do this :
RewriteRule ^user/(.*)$ index.php?&user=$1
If you want to test out some htaccess I will recomande this usedul site : http://htaccess.madewithlove.be/