trouble in multiple file upload

appUpload.php

<?php 

   class AppUpload{
        
  	public $appName,$desc,$keyword,$price;
		public $formName;
		  public function __construct(){
		     if(isset($_POST['submit'])){
			    $this->appName  = $_POST['appName'];
				$this->desc     = $_POST['description'];
				$this->keyword  = $_POST['keyword'];
				$this->price    = $_POST['price'];
				$this->formName = array();
				$this->formName[0] =  'file2';
				$this->formName[1] =  'file';
				$this->formName[2] =  'snapshot1';
				$this->formName[3] =  'snapshot2';
				$this->formName[4] =  'snapshot3';
				for($x = 0; $x <= 4; $x++){
				    $this->renameMoveFile($this->formName[$x]);
				}
			   
			 }
		  }
		  
		  
		  
		 private function renameMoveFile($filename){
		 $fileType = $_FILES[$filename]['type'];
		    if($fileType == 'image/png' || $fileType == 'image/jpeg'|| $fileType == 'image/gif' || $fileType == 'image/jpg'){
			    $fileCode = 0;
			}else{
			    $fileCode = 1;
			}
			$ext = $fileCode == 0 ? '.jpg' : '.zip' ;
			$dir = $fileCode == 0 ? 'images' : 'downloads' ;
			$path = '../app/'.$dir.'/'.$_FILES[$filename]['name'];
			
			   move_uploaded_file($_FILES[$filename]["tmp_name"],$path);
			   $newName = '../app/'.$dir.'/'.time().$ext;
			   rename($path,$newName);
			   return $newName;
		 }
   }
?>

upload.php

<?php $appupload = new AppUpload(); ?>
<form action="" method="post" enctype="multipart/form-data">
<table width="600" border="1" cellspacing="0" cellpadding="0">
  <tr>
    <td>App name</td>
    <td><input name="appName" type="text"  /></td>
  </tr>
  <tr>
    <td>App thumbnail</td>
    <td><input name="file" type="file" /></td>
  </tr>
  <tr>
    <td>App Snapshot1</td>
    <td><input name="snapshot1" type="file" /></td>
  </tr>  
  <tr>
    <td>App Snapshot2</td>
    <td><input name="snapshot2" type="file" /></td>
  </tr>
  <tr>
    <td>App Snapshot3</td>
    <td><input name="snapshot3" type="file" /></td>
  </tr>
  <tr>
    <td>App File</td>
    <td><input name="file2" type="file" /></td>
  </tr>
  <tr>
    <td>App Description</td>
    <td><textarea name="description" cols="2" rows="2"style="margin: 2px; width: 366px; height: 107px;">&nbsp;</textarea></td>
  </tr>
  <tr>
    <td>App Keyword</td>
    <td><textarea name="keyword" cols="2" rows="2" style="margin: 2px; width: 366px; height: 107px;">&nbsp;</textarea></td>
  </tr>
  <tr>
    <td>App Price</td>
    <td><input name="price" type="number" /></td>
  </tr>
  <tr>
    <td></td>
    <td><input name="submit" type="submit" /></td>
  </tr>
</table>
</form>