https://www.icyphoenix.com/viewtopic.php?f=26&t=1119&p=8793#p8793
-----------------------------------
Artie
Tue 13 Feb, 2007 21:53

Re: Rewrite Jpg Url-s In Album
-----------------------------------
Works for me as below.......

My phpbb_root is [highlight=#FFFFAA]web_root/forum[/highlight] and I placed the htaccess file  in my [highlight=#FFFFAA]web_root[/highlight]
Accessed the pic by [highlight=#FFFFAA]MyDoman.com/pic_[highlight=#FF0000]ID[/highlight].jpg[/highlight]


[codeblock]RewriteEngine On   
RewriteBase / 
RewriteRule ^pic_([0-9]*).jpg forum/album_pic.php?pic_id=$1 [L,NC][/codeblock]

If your web_root is also your phpbb_root try this.....

[codeblock]RewriteEngine On   
RewriteBase / 
RewriteRule ^pic_([0-9]*).jpg album_pic.php?pic_id=$1 [L,NC][/codeblock]

Note that you must have Hotlink Prevention disabled (ACP) to use this short url in any domain other that yours (or have that domain in the allowed list)