Upload Image in PHP and Create Directory if not Available directory in the Path

define('UPLOAD_PATH_CAT', SITE_URL.'/yourPath');

if(isset($_FILES['categoryImg']['name']) && !empty($_FILES['categoryImg']['name'])):

if (!file_exists(UPLOAD_PATH_CAT)):  
   mkdir(UPLOAD_PATH_CAT, 0777, true);
$content = "No Direct Access!";
$fp = fopen(UPLOAD_PATH_CAT."/index.html","wb");
fwrite($fp,$content);
endif;
$fileParts = explode(".",$_FILES['categoryImg']['name']);
$ext = end($fileParts);
unset($fileParts[count($fileParts)-1]);  // extension removed from file name;
/**  File Name without extension  **/
$fName = implode(".",$fileParts)."_".strtotime(date('Y-m-d H:i:s'));
/**  File Name With Extension  **/
$fName =  preg_replace("/[!@#$%^&*()-+|{}\s]/","_",$fName);
$fileName = str_replace(" ","_",$fName.".".$ext);
move_uploaded_file($_FILES['categoryImg']['tmp_name'],
UPLOAD_PATH_CAT.$fileName);
$data['categoryImg']=$fileName;

if(isset($editPageId) && $editPageId!=''):
$bData=$this->common_model->getData($editPageId,'category','categoryId');
$unlinkUrl=UPLOAD_PATH_CAT."{$bData->categoryImg}";
if(file_exists($unlinkUrl)):
unlink($unlinkUrl);
endif;
endif;
endif;