如何重写规则htaccess

Question

我需要将网址从mydomain.com/index.php/1122重写为mydomain.com/1122

我正在尝试

RewriteRule ^register\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /register.php [L]

但无法正常工作500内部服务器错误