Here are a few title options, focusing on the question format you requested: **Short & Direct:** * **How Do I Get Accurate Visitor IP Addresses When Using CloudFlare?** * **Why Does CloudFlare A

Understanding CloudFlare and PHP IP Address Logging

When using PHP's $_SERVER['REMOTE_ADDR'] to track website visitors, it's crucial to consider the use of CloudFlare for caching and security. CloudFlare proxies visitor requests, leading to the exposure of its own IP addresses rather than the actual visitor IPs.

Addressing the Issue

To obtain the accurate IP addresses of website visitors while using CloudFlare, CloudFlare provides specialized server variables. The key variable is:

• $_SERVER["HTTP_CF_CONNECTING_IP"]: This server variable contains the actual visitor IP address.

Implementation

To use this variable, simply update your code as follows:

<code class="php">if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
  $_SERVER['REMOTE_ADDR'] = $_SERVER["HTTP_CF_CONNECTING_IP"];
}</code>

Additional Considerations

• Ensure that the visitor IP address is valid by verifying it against CloudFlare's valid IP address range.

• CloudFlare also provides other server variables, such as:

  • $_SERVER["HTTP_CF_IPCOUNTRY"]: Visitor's country code
  • $_SERVER["HTTP_CF_RAY"]: Request ID
  • $_SERVER["HTTP_CF_VISITOR"]: HTTP/HTTPS visitor status

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