yes!

upload.php

@@ -22,16 +22,15 @@ function generateMapId()
 function isZipFile($file)
 {
   $fileType = strtolower(pathinfo($file, PATHINFO_EXTENSION));
-  echo $fileType;
-  die();
   return $fileType == "zip";
 }
 
 $mapId = generateMapId(); // the id of the map
 
-$file = $_FILES["map"]["tmp_name"]; // the file to upload
+$map = $_FILES["map"]; // the file to upload
+$file = $map["tmp_name"]; // the temporary file path
 
-if (!isZipFile($file)) {
+if (!isZipFile($map["name"])) {
   echo "The file is not a zip file";
   die();
 }