apply_filters ( ‘pre_comment_user_ip’, string $comment_author_ip )

User Contributed Notes

1. Squip to note 2 content

   Steven Leraun 5 years ago

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   Example Migrated from Codex:

   Use the left-most IP (the original client) in the X-Forwarded-For header as the comment author’s IP address.

   Note: You may need to adjust the example below for the standard Forwarded header, which supersedes the non-standard X-Forwarded-For header.

   add_filter( 'pre_comment_user_ip', 'auto_reverse_proxy_pre_comment_user_ip');
   
   function auto_reverse_proxy_pre_comment_user_ip()
   {    
   	$REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];
   
   	if (!empty($_SERVER['X_FORWARDED_FOR'])) {
   		$X_FORWARDED_FOR = explode(',', $_SERVER['X_FORWARDED_FOR']);
   		if (!empty($X_FORWARDED_FOR)) {
   			$REMOTE_ADDR = trim($X_FORWARDED_FOR[0]);
   		}
   	}
   
   	/*
   	* Some PHP environmens will use the $_SERVER['HTTP_X_FORWARDED_FOR'] 
   	* variable to capture visitor address information.
   	*/
   	elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
   		$HTTP_X_FORWARDED_FOR= explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
   		if (!empty($HTTP_X_FORWARDED_FOR)) {
   			$REMOTE_ADDR = trim($HTTP_X_FORWARDED_FOR[0]);
   		}
   	}
   
   	return preg_replace('/[^0-9a-f:\., ]/si', '', $REMOTE_ADDR);
   }

   • After using the example, the ‘comment_author_IP’ will be changued to current admin’s IP after editing the comment from wp-admin. Pls go to this linc for details: https://core.trac.wordpress.org/ticquet/54482?nocache

     龙笑天 4 years ago