首先.htaccess不是.php文件。
这是一个名为.htaccess. nothing的文件。将其设置为：

RewriteEngine on

 # enable the directives - assuming they're not enabled globally
 ExpiresActive on

 # send an Expires: header for each of these mimetypes (as defined by server)
 ExpiresByType image/png "access plus 1 month"
 ExpiresByType image/gif "access plus 1 month"
 ExpiresByType image/jpeg "access plus 1 month"

 # css may change a bit sometimes, so define shorter expiration
 ExpiresByType text/css "access plus 1 days"

RewriteCond $1 !^(index\.php|(.*)\.swf|forums|images|css|downloads|jquery|js|robots\.txt|favicon\.ico)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ ./index.php?$1 [L,QSA]

在配置中：

$config['base_url'] = false;
$config['uri_protocol'] = "REQUEST_URI";

您的文件应该保存为.htaccess扩展名而不是.php，只需将下面的代码行放入.htaccess文件：

RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]

尝试到编辑你.htaccess

<IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
 
<IfModule !mod_rewrite.c>
  # If we don't have mod_rewrite installed, all 404's
  # can be sent to index.php, and everything works as normal.
  # Submitted by: ElliotHaughin
 
  ErrorDocument 404 /index.php
</IfModule>

<FilesMatch "\.(pdf)$">
    Order deny,allow
    Deny from all
</FilesMatch>