| 6 bootstrap.inc | ip_address() |
| 7 bootstrap.inc | ip_address() |
| 8 bootstrap.inc | ip_address() |
Returns the IP address of the client machine.
If Drupal is behind a reverse proxy, we use the X-Forwarded-For header instead of $_SERVER['REMOTE_ADDR'], which would be the IP address of the proxy server, and not the client's. The actual header name can be configured by the reverse_proxy_header variable.
Return value
IP address of client machine, adjusted for reverse proxy and/or cluster environments.
File
- includes/
bootstrap.inc, line 2775 - Functions that need to be loaded on every Drupal request.
Code
<?php
function ip_address() {
$ip_address = &drupal_static(__FUNCTION__);
if (!isset($ip_address)) {
$ip_address = $_SERVER['REMOTE_ADDR'];
if (variable_get('reverse_proxy', 0)) {
$reverse_proxy_header = variable_get('reverse_proxy_header', 'HTTP_X_FORWARDED_FOR');
if (!empty($_SERVER[$reverse_proxy_header])) {
// If an array of known reverse proxy IPs is provided, then trust
// the XFF header if request really comes from one of them.
$reverse_proxy_addresses = variable_get('reverse_proxy_addresses', array());
// Turn XFF header into an array.
$forwarded = explode(',', $_SERVER[$reverse_proxy_header]);
// Trim the forwarded IPs; they may have been delimited by commas and spaces.
$forwarded = array_map('trim', $forwarded);
// Tack direct client IP onto end of forwarded array.
$forwarded[] = $ip_address;
// Eliminate all trusted IPs.
$untrusted = array_diff($forwarded, $reverse_proxy_addresses);
// The right-most IP is the most specific we can trust.
$ip_address = array_pop($untrusted);
}
}
}
return $ip_address;
}
?>