diff --git a/src/Core/HttpClients/CurlHttpClient.php b/src/Core/HttpClients/CurlHttpClient.php
index f5c66634..a4e0dbde 100644
--- a/src/Core/HttpClients/CurlHttpClient.php
+++ b/src/Core/HttpClients/CurlHttpClient.php
@@ -118,8 +118,8 @@ private function handleErrors(){
      */
     public function setIntuitResponse($response){
         $headerSize = $this->basecURL->getInfo(CURLINFO_HEADER_SIZE);
-        $rawHeaders = mb_substr($response, 0, $headerSize);
-        $rawBody = mb_substr($response, $headerSize);
+        $rawHeaders = substr($response, 0, $headerSize);
+        $rawBody = substr($response, $headerSize);
         $httpStatusCode = $this->basecURL->getInfo(CURLINFO_HTTP_CODE);
         $theIntuitResponse = new IntuitResponse($rawHeaders, $rawBody, $httpStatusCode, true);
         $this->intuitResponse = $theIntuitResponse;
diff --git a/src/DataService/DataService.php b/src/DataService/DataService.php
index 688ab41b..de31cf2b 100644
--- a/src/DataService/DataService.php
+++ b/src/DataService/DataService.php
@@ -270,7 +270,22 @@ public function setLogLocation($new_log_location)
         return $this;
     }
 
-    /**
+    /** (bch36)
+	 * Set a callback function for request and response logs
+	 *
+	 * @param callable $callback     The callback function for receiving request and response logs
+	 *
+	 * @return $this
+	 */
+	public function setLogCallback($callback)
+	{
+		$restHandler = $this->restHandler;
+		$loggerUsedByRestHandler = $restHandler->getRequestLogger();
+		$loggerUsedByRestHandler->setLogCallback($callback);
+		return $this;
+	}
+	
+	/**
      * Set logging for OAuth calls
      *
      * @param Boolean $enableLogs          Turns on logging for OAuthCalls
diff --git a/src/Diagnostics/LogRequestsToDisk.php b/src/Diagnostics/LogRequestsToDisk.php
index 4100ecd8..25cd4f0c 100644
--- a/src/Diagnostics/LogRequestsToDisk.php
+++ b/src/Diagnostics/LogRequestsToDisk.php
@@ -23,6 +23,12 @@ class LogRequestsToDisk
      */
     public $ServiceRequestLoggingLocation;
 
+	/**
+	 * The Service Request Logging Callback. (bch36)
+	 * @var callable
+	 */
+	public $ServiceRequestLoggingCallback;
+	
     /**
      * Initializes a new instance of the LogRequestsToDisk class.
      * @param bool enableServiceRequestLogging Value indicating whether to log request response messages
@@ -50,6 +56,15 @@ public function setLogDirectory($logDirectory){
         $this->ServiceRequestLoggingLocation = $logDirectory;
     }
 
+	/** (bch36)
+	 * Set a callback function for request and response logs
+	 * @param callable $callback     The callback function for receiving request and response logs
+	 */
+	public function setLogCallback($callback)
+	{
+		$this->ServiceRequestLoggingCallback = $callback;
+	}
+	
     /**
      * Gets the log destination folder
      * @return string log destination folder
@@ -104,15 +119,16 @@ public function LogPlatformRequests($xml, $url, $headers, $isRequest)
                     $collapsedHeaders[] = "{$key}: {$val}";
                 }
 
-                file_put_contents($filePath,
-                                  ($isRequest?"REQUEST":"RESPONSE")." URI FOR SEQUENCE ID {$sequenceNumber}\n==================================\n{$url}\n\n",
-                                  FILE_APPEND);
-                file_put_contents($filePath,
-                                  ($isRequest?"REQUEST":"RESPONSE")." HEADERS\n================\n".implode("\n", $collapsedHeaders)."\n\n",
-                                  FILE_APPEND);
-                file_put_contents($filePath,
-                                  ($isRequest?"REQUEST":"RESPONSE")." BODY\n=============\n".$xml."\n\n",
-                                  FILE_APPEND);
+                $message =
+					($isRequest?"REQUEST":"RESPONSE")." URI FOR SEQUENCE ID {$sequenceNumber}\n==================================\n{$url}\n\n" .
+					($isRequest?"REQUEST":"RESPONSE")." HEADERS\n================\n".implode("\n", $collapsedHeaders)."\n\n" .
+					($isRequest?"REQUEST":"RESPONSE")." BODY\n=============\n".$xml."\n\n";
+
+                file_put_contents($filePath, $message);
+
+				if (is_callable($this->ServiceRequestLoggingCallback))
+					call_user_func($this->ServiceRequestLoggingCallback, $isRequest, $message, $url, $xml, $headers);
+				
             } catch (\Exception $e) {
                 throw new IdsException("Exception during LogPlatformRequests.");
             }