我正在尋找一種在上傳照片之前調整照片大小的方法，我找到了下面的代碼，它完全符合我的目標，只是希望它不會將原始圖像與裁剪圖像一起存儲在目錄中。我對它做了一些更改，但沒有成功。我希望我能得到一些幫助。  if(isset($_POST["submit"])) {      if(is_array($_FILES)) {    $uploadedFile = $_FILES['file']['tmp_name'];     $sourceProperties = getimagesize($uploadedFile);    $newFileName = time();    $dirPath = "uploads/";    $ext = pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION);    $imageType = $sourceProperties[2];    switch ($imageType) {        case IMAGETYPE_PNG:            $imageSrc = imagecreatefrompng($uploadedFile);             $tmp = imageResize($imageSrc,$sourceProperties[0],$sourceProperties[1]);            imagepng($tmp,$dirPath. $newFileName. "_thump.". $ext);            break;                   case IMAGETYPE_JPEG:            $imageSrc = imagecreatefromjpeg($uploadedFile);             $tmp = imageResize($imageSrc,$sourceProperties[0],$sourceProperties[1]);            imagejpeg($tmp,$dirPath. $newFileName. "_thump.". $ext);            break;        case IMAGETYPE_GIF:            $imageSrc = imagecreatefromgif($uploadedFile);             $tmp = imageResize($imageSrc,$sourceProperties[0],$sourceProperties[1]);            imagegif($tmp,$dirPath. $newFileName. "_thump.". $ext);            break;        default:            echo "Invalid Image type.";            exit;            break;    }    move_uploaded_file($uploadedFile, $dirPath. $newFileName. ".". $ext);    echo "Image Resize Successfully.";    }  }   function imageResize($imageSrc,$imageWidth,$imageHeight) {    $newImageWidth =900;    $newImageHeight =534;     $newImageLayer=imagecreatetruecolor($newImageWidth,$newImageHeight);   imagecopyresampled($newImageLayer,$imageSrc,0,0,0,0,$newImageWidth,$newImageHeight,$imageWidth,$imageHeight);    return $newImageLayer;}?>