diff --git a/main/exercise/Hpdownload.php b/main/exercise/Hpdownload.php
index 3b839b13d7..c0b674e80b 100755
--- a/main/exercise/Hpdownload.php
+++ b/main/exercise/Hpdownload.php
@@ -12,12 +12,12 @@
 session_cache_limiter('public');
 
 require_once __DIR__.'/../inc/global.inc.php';
-$this_section=SECTION_COURSES;
+$this_section = SECTION_COURSES;
 
 $tbl_document = Database::get_course_table(TABLE_DOCUMENT);
 
-$doc_url=str_replace(array('../','\\..','\\0','..\\'),array('','','',''),urldecode($_GET['doc_url']));
-$filename=basename($doc_url);
+$doc_url = str_replace(array('../','\\..','\\0','..\\'),array('','','',''),urldecode($_GET['doc_url']));
+$filename = basename($doc_url);
 
 // launch event
 //Event::event_download($doc_url);
@@ -29,34 +29,54 @@ if (isset($_course['path'])) {
 	$full_file_name = $course_path.Security::remove_XSS($doc_url);
 }
 
-if(!is_file($full_file_name)) {
+if (!is_file($full_file_name)) {
 	exit;
 }
 
-if (!Security::check_abs_path($full_file_name, $course_path.'/')) {
+if (!Security::check_abs_path($full_file_name, $course_path . '/')) {
     exit;
 }
 
-$extension=explode('.',$filename);
-$extension=strtolower($extension[sizeof($extension)-1]);
+$extension = explode('.', $filename);
+$extension = strtolower($extension[sizeof($extension) - 1]);
 
 switch($extension) {
-	case 'gz':		$content_type='application/x-gzip';			break;
-	case 'zip':		$content_type='application/zip';			break;
-	case 'pdf':		$content_type='application/pdf';			break;
-	case 'png':		$content_type='image/png';					break;
-	case 'gif':		$content_type='image/gif';					break;
-	case 'jpg':		$content_type='image/jpeg';					break;
-	case 'txt':		$content_type='text/plain';					break;
-	case 'htm':		$content_type='text/html';					break;
-	case 'html':	$content_type='text/html';					break;
-	default:		$content_type='application/octet-stream';	break;
+	case 'gz':
+		$content_type = 'application/x-gzip';
+		break;
+	case 'zip':
+		$content_type = 'application/zip';
+		break;
+	case 'pdf':
+		$content_type = 'application/pdf';
+		break;
+	case 'png':
+		$content_type = 'image/png';
+		break;
+	case 'gif':
+		$content_type = 'image/gif';
+		break;
+	case 'jpg':
+		$content_type = 'image/jpeg';
+		break;
+	case 'txt':
+		$content_type = 'text/plain';
+		break;
+	case 'htm':
+		$content_type = 'text/html';
+		break;
+	case 'html':
+		$content_type = 'text/html';
+		break;
+	default:
+		$content_type = 'application/octet-stream';
+		break;
 }
 
-header('Content-disposition: filename='.$filename);
-header('Content-Type: '.$content_type);
-header('Expires: '.gmdate('D, d M Y H:i:s',time()+10).' GMT');
-header('Last-Modified: '.gmdate('D, d M Y H:i:s',time()+10).' GMT');
+header('Content-disposition: filename=' . $filename);
+header('Content-Type: ' . $content_type);
+header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 10) . ' GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time() + 10) . ' GMT');
 
 /*
 	Dynamic parsing section
@@ -69,11 +89,11 @@ header('Last-Modified: '.gmdate('D, d M Y H:i:s',time()+10).' GMT');
 
 if ($content_type == 'text/html') {
 	$directory_name = dirname($full_file_name);
+    $coursePath = api_get_path(SYS_COURSE_PATH);
+	$dir=str_replace(array('\\', $coursePath . $_course['path'] . '/document'), array('/', ''), $directory_name);
 
-	$dir=str_replace(array('\\',$_configuration['root_sys']."courses/".$_course['path'].'/document'),array('/',''),$directory_name);
-
-	if($dir[strlen($dir)-1] != '/') {
-		$dir.='/';
+	if ($dir[strlen($dir)-1] != '/') {
+		$dir .= '/';
 	}
 
 
@@ -82,15 +102,14 @@ if ($content_type == 'text/html') {
 	$file_content = fread ($fp, filesize ($full_file_name));
 	fclose($fp);
     $exercisePath = api_get_self();
-  	$exfile = explode('/',$exercisePath);
-  	$exfile = $exfile[sizeof($exfile)-1];
-  	$exercisePath = substr($exercisePath,0,strpos($exercisePath,$exfile));
-  	$exercisePath = $exercisePath;
+  	$exfile = explode('/', $exercisePath);
+  	$exfile = $exfile[sizeof($exfile) - 1];
+  	$exercisePath = substr($exercisePath,0,strpos($exercisePath, $exfile));
 
-		$content = $file_content;
-		$mit = "function Finish(){";
+    $content = $file_content;
+    $mit = "function Finish(){";
 
-		$js_content = "var SaveScoreVariable = 0; // This variable included by Dokeos System\n".
+    $js_content = "var SaveScoreVariable = 0; // This variable included by Dokeos System\n".
 		"function mySaveScore() // This function included by Dokeos System\n".
 "{\n".
 "   if (SaveScoreVariable==0)\n".
@@ -109,28 +128,28 @@ if ($content_type == 'text/html') {
 "// Must be included \n".
 "function Finish(){\n".
 " mySaveScore();";
-		$newcontent = str_replace($mit,$js_content,$content);
+    $newcontent = str_replace($mit, $js_content, $content);
 
-		$prehref="javascript:void(0);";
-		$posthref = api_get_path(WEB_CODE_PATH) . "main/exercise/Hpdownload.php?doc_url=".$doc_url."&cid=".$cid."&uid=".$uid;
-		$newcontent = str_replace($prehref,$posthref,$newcontent);
+    $prehref = "javascript:void(0);";
+    $posthref = api_get_path(WEB_CODE_PATH) . "main/exercise/Hpdownload.php?doc_url=" . $doc_url . "&cid=" . $cid . "&uid=" . $uid;
+    $newcontent = str_replace($prehref, $posthref, $newcontent);
 
 
-		$prehref="class=\"GridNum\" onclick=";
-		$posthref="class=\"GridNum\" onMouseover=";
-		$newcontent = str_replace($prehref,$posthref,$newcontent);
+    $prehref = "class=\"GridNum\" onclick=";
+    $posthref = "class=\"GridNum\" onMouseover=";
+    $newcontent = str_replace($prehref, $posthref, $newcontent);
 
 
-		header('Content-length: '.strlen($newcontent));
-		// Dipsp.
-		echo $newcontent;
+    header('Content-length: '.strlen($newcontent));
+    // Dipsp.
+    echo $newcontent;
 
 	exit();
 }
 
 //normal case, all non-html files
-//header('Content-length: '.filesize($full_file_name));
-$fp=fopen($full_file_name,'rb');
+//header('Content-length: ' . filesize($full_file_name));
+$fp = fopen($full_file_name, 'rb');
 fpassthru($fp);
 fclose($fp);
-?>
+