使用php更新我的wordpres的.htaccess

I need to add new dynamic roles in my wordpress's .htaccess

I just do it using the following script:

$f = fopen(".htaccess", "a+");
fwrite($f, "your content");
fclose($f);

...but I need to write before the WP comments:

# BEGIN WordPress
Wp roles...
# END WordPress

is is possibile, by PHP to write in a specific section of my .htaccess?

You could use flush_rules (codex). A hard flush will actually rewrite the .htaccess.

You can combine it together with add_rewrite_rule() (codex), and generally all the Rewrite_API.

I would not recommend to use your own function to do that, and it is also not recommended to call this function on each load - it can greatly reduce performance.