I am trying to force PDFs to download and not open in user browser so I add this snippet to .htaccess but it causes internal server error.

<FilesMatch “.(pdf)$”> ForceType application/octet-stream Header set Content-Disposition attachment </FilesMatch>

I used this code before on shared hosting. Plus I tried other snippets but it seems like when ever I edit .htaccess from console or ftp it causes internal server error.

My default working .htacces with 664 permission

BEGIN WordPress

<IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index.php$ - [L]

add a trailing slash to /wp-admin

RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^ - [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).) $2 [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(..php)$ $2 [L] RewriteRule . index.php [L] </IfModule>

END WordPress