| | 1 | Got it, [https://developer.wordpress.org/reference/hooks/pre_comment_user_ip/#comment-4830], this example has a little problem. |
| | 2 | |
| | 3 | After I change it as below, the issue is fixed. |
| | 4 | |
| | 5 | {{{#!php |
| | 6 | add_filter( 'pre_comment_user_ip', 'auto_reverse_proxy_pre_comment_user_ip'); |
| | 7 | function auto_reverse_proxy_pre_comment_user_ip($comment_author_IP) { |
| | 8 | if( is_admin() ){ |
| | 9 | return $comment_author_IP; |
| | 10 | } |
| | 11 | |
| | 12 | $REMOTE_ADDR = $_SERVER['REMOTE_ADDR']; |
| | 13 | |
| | 14 | if (!empty($_SERVER['X_FORWARDED_FOR'])) { |
| | 15 | $X_FORWARDED_FOR = explode(',', $_SERVER['X_FORWARDED_FOR']); |
| | 16 | if (!empty($X_FORWARDED_FOR)) { |
| | 17 | $REMOTE_ADDR = trim($X_FORWARDED_FOR[0]); |
| | 18 | } |
| | 19 | } |
| | 20 | |
| | 21 | /* |
| | 22 | * Some PHP environments will use the $_SERVER['HTTP_X_FORWARDED_FOR'] |
| | 23 | * variable to capture visitor address information. |
| | 24 | */ |
| | 25 | elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { |
| | 26 | $HTTP_X_FORWARDED_FOR= explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); |
| | 27 | if (!empty($HTTP_X_FORWARDED_FOR)) { |
| | 28 | $REMOTE_ADDR = trim($HTTP_X_FORWARDED_FOR[0]); |
| | 29 | } |
| | 30 | } |
| | 31 | |
| | 32 | return preg_replace('/[^0-9a-f:\., ]/si', '', $REMOTE_ADDR); |
| | 33 | } |
| | 34 | }}} |