上传

Question

我想在上传时更改图片名称。

这是我的代码：

if(isset($_POST['submit']))
{
    $target_dir = "pictures/";
    $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

    // Allow certain file formats
    if($imageFileType != "gif" ) {
        echo "Sorry only GIF files are allowed.";
        $uploadOk = 0;
    }
    // Check if $uploadOk is set to 0 by an error
    if ($uploadOk == 0) {
        echo "Sorry, your file was not uploaded.";
    // if everything is ok, try to upload file
    } else {
        if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
            echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
            header('Location:field_medal_winner.php');
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }
}

首先，我尝试更改move_uploaded_file函数。 但我得到了其他消息：

if (move_uploaded_file("text.gif", $target_file)) {
    echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
} else {
    echo "Sorry, there was an error uploading your file.";
}

有没有人知道我做错了什么？

Answer 1

替换这两行

$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

使用

$target_file = $target_dir . "text.gif";
$imageFileType = pathinfo($_FILES["fileToUpload"]["name"],PATHINFO_EXTENSION);

它将在您想要的文件夹中保存为 text.gif 。但是，请记住，无论您上传什么文件，它都会将旧的 text.gif 文件覆盖为 text.gif ，因为上传了同名文件。

更新代码

if(isset($_POST['submit']))
{
  $target_dir = "pictures/";
  $target_file = $target_dir . "text.gif";
  $uploadOk = 1;
  $imageFileType = pathinfo($_FILES["fileToUpload"]["name"],PATHINFO_EXTENSION);

  // Allow certain file formats
  if(($imageFileType != "gif") || ($imageFileType != "GIF")) {
    echo "Sorry only GIF files are allowed.";
    $uploadOk = 0;
  }
  // Check if $uploadOk is set to 0 by an error
  if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
  } else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
      echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
      header('Location:field_medal_winner.php');
    } else {
      echo "Sorry, there was an error uploading your file.";
    }
  }
}