如何動態添加圖像擴展名？

Question

我的問題是如何動態添加圖像擴展名。因此，當用戶更新其配置文件時，它可以顯示所有圖像類型，例如jpg png或jpeg。我知道我使用了png但不知道如何動態添加擴展名。告訴我如何使照片具有獨特性，以便用戶上傳下一張個人資料圖像時，它不會被舊的圖像覆蓋。

   <img src="uploads/profile/profile'.$_SESSION['iduser'].'.png" class="img-
    responsive "img-circle"  alt="User Image" >  


   $files = $_FILES['uploadphoto'];
   $fileName = $_FILES['uploadphoto']['name'];
   $fileTmpName= $_FILES['uploadphoto']['tmp_name'];
   $fileSize =$_FILES['uploadphoto']['size'];
   $fileError =$_FILES['uploadphoto']['error'];
   $fileType =$_FILES['uploadphoto']['type'];
   $fileExt = explode('.',$fileName);
   $fileActualExt =strtolower(end($fileExt));
   if($fileType ='jpg' && $fileType ='png' && $fileType ='jpeg'){
   if($fileError === 0){
   if($fileSize < 5000000){
   $fileNewName = "profile".$id.".".$fileActualExt;
   $fileDestination ="uploads/profile/".$fileNewName;
   move_uploaded_file($fileTmpName,$fileDestination);
   $sqlImg = "UPDATE profilestatus SET status =0 WHERE iduser = '$id'";
   mysqli_query($conn,$sqlImg);
   }else{
        echo "Your file is to big to upload!";
        }
   }else{
        echo "There is an error!";
        }
  }
   else{
       echo "Photo cannot be uploaded! image is not of the type jpg png or 
       jpeg";
       }

Answer 1

您可以使用該功能

if([name of the added file] > NULL){you change the name}else{you save the file on the server}