Fixed install issue preventing the right check on directories creation

main/install/install.lib.php

@@ -2162,11 +2162,11 @@ function check_course_script_interpretation($course_dir, $course_attempt_name, $
     $content = '<?php echo "123"; exit;';
 
     if (is_writable($file_name)) {
-        if ($handler = @fopen($file_name, "w")) {
-            //write content
-            if (fwrite($handler , $content)) {
+        if ($handler = @fopen($file_name, "w")) {
+            //write content
+            if (fwrite($handler, $content)) {
                 $sock_errno = ''; $sock_errmsg = '';
-                $url = api_get_path(WEB_COURSE_PATH).'/'.$course_attempt_name.'/'.$file;
+                $url = api_get_path(WEB_COURSE_PATH).$course_attempt_name.'/'.$file;
 
                 $parsed_url = parse_url($url);
                 //$scheme = isset($parsedUrl['scheme']) ? $parsedUrl['scheme'] : ''; //http
@@ -2174,7 +2174,7 @@ function check_course_script_interpretation($course_dir, $course_attempt_name, $
                 $path = isset($parsed_url['path']) ? $parsed_url['path'] : '/';
                 $port = isset($parsed_url['port']) ? $parsed_url['port'] : '80';
 
-                //Check fsockopen
+                //Check fsockopen (doesn't work with https)
                 if ($fp = @fsockopen(str_replace('http://', '', $url), -1, $sock_errno, $sock_errmsg, 60)) {
                     $out  = "GET $path HTTP/1.1\r\n";
                     $out .= "Host: $host\r\n";