Redirecting to 404 page when wrong url is entered

Question

I have a 404 error page and tried the below code which was generated from this link . But when the wrong URL is entered it redirects to the main page, not to the 404 error page

<IfModule mod_rewrite.c>
RewriteEngine On
ErrorDocument 404 https://www.rcis.in/404.php
</IfModule>

I have added the code in htaccess file. And also how to remove the file extension from the URL. Down below is the code I tried

 #Remove extension
 RewriteEngine On
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteRule ^([^\.]+)$ $1.php [NC,L]

And I tried below code which was generated from that website which is mentioned above

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^/?(.*).(php)$ /$1 [R=301,L]

</IfModule>

How can I solve these two

Thank You in advance

Answer 1

The below code will remove php extention from the URL

RewriteEngine On
# for 404 redirection
ErrorDocument 404 https://www.yourdomain.in/404
# below code rewrites php extention
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php [NC,L]
# Remove php extention
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^\ ]+)\.php
RewriteRule ^/?(.*)\.php$ /$1 [L,R=301]

Hence the url https://www.yourdomain.in/404 will load https://www.yourdomain.in/404.php