mod rewrite seo friendly url passed as parameter only works with prefix on url

Question

the following Rewrite succeeds: (site.com/content/-seo-friendly-url)

RewriteEngine on
RewriteRule ^content-(.*)$ ./get_content.php?url=$1

but this example does not work: (site.com/content/seo-friendly-url)

RewriteEngine on
RewriteRule ^(.*)$ ./get_content.php?url=$1

I get a 500 Internal Server Error

and this gets a 404 Not Found

RewriteRule ^([a-zA-Z0-9-])$ ./get_content.php?url=$1

and this passes 'get_content' as the ($1) parameter to get_content.php with no error

RewriteRule ^(.*)$ get_content.php?url=$1

my goal is to pass the url to get_content.php without a prefix.

Answer 1

RewriteEngine On

RewriteRule ^content/get_content.php\?url\=seo-friendly-url$ /content/seo-friendly-url [L]

try this code or incase if that doesnt work for you try this rule 

RewriteRule ^([\w-]+)$ get_content.php?url=$1

and for more information take a look into this article https://www.generateit.net/mod-rewrite/index.php