Remove query string parameter to create a more user-friendly URL

I have this .htaccess file and I have no knowledge with mod_rewrite,

RewriteEngine On
RewriteRule ^(.+[^/])/$ http://%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{THE_REQUEST} s/([^.]+).php [NC]
RewriteRule ^ /%1 [NE,L,R]
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)/?$ /$1.php  [L]

What I want to achieve is to have localhost/viewticket/${id} instead of localhost/viewticket.php?id=123

I have tried many .htaccess rules but none worked except this one that hides .php in my URL.

Answer

I created this one for you, just erase yours and copy this one enjoy^^

IndexIgnore */*

Options FollowSymLinks
AddDefaultCharset utf-8

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteRule ^viewticket/([^/]+)/?([^/]*)/?([^/]*)$ viewticket.php?id=$1&param2=$2&param3=$3 [L]
    RewriteCond %{REQUEST_FILENAME}.php -f
    RewriteRule ^(.*)/?$ /$1.php  [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-l
    RewriteRule . index.php [L]
</IfModule>```