Provide a unique request identifier

[lhc/web/wiklou.git] / includes / WebRequest.php

diff --git a/includes/WebRequest.php b/includes/WebRequest.php
index 812a320..f4b4871 100644 (file)
--- a/includes/WebRequest.php
+++ b/includes/WebRequest.php
@@ -246,6 +246,25 @@ class WebRequest {
                return microtime( true ) - $this->requestTime;
        }
 
+       /**
+        * Get the unique request ID.
+        * This is either the value of the UNIQUE_ID envvar (if present) or a
+        * randomly-generated 24-character string.
+        *
+        * @return string
+        * @since 1.27
+        */
+       public static function getRequestId() {
+               static $reqId;
+
+               if ( !$reqId ) {
+                       $reqId = isset( $_SERVER['UNIQUE_ID'] )
+                               ? $_SERVER['UNIQUE_ID'] : wfRandomString( 24 );
+               }
+
+               return $reqId;
+       }
+
        /**
         * Get the current URL protocol (http or https)
         * @return string